- set MemoryHigh to infinity in deployment/chatwoot-worker.1.service so
the worker is throttled only by the existing
MemoryMax hard limit
- prevents cgroup reclaim from slowing Sidekiq under transient spikes
while still keeping the hard stop at 1.5 GB
## Description
The `annotate` gem has been deprecated and users are experiencing
annotation errors with the new Rails 7 `serialize` syntax. This PR
migrates to `annotaterb`, the actively maintained fork.
Users reported errors when running `make db`:
```
Unable to annotate app/models/installation_config.rb: no implicit conversion of Hash into String
Unable to annotate app/models/installation_config.rb: no implicit conversion of nil into Array
```
This PR updates the Gemfile and rake configuration to use `annotaterb`
instead.
Fixes#11673
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
Tested locally with the following steps:
1. Run `bundle install` - successfully installed annotaterb 4.20.0
2. Run `RAILS_ENV=development bundle exec rails db:chatwoot_prepare` -
completed without annotation errors
3. Run `RAILS_ENV=development bundle exec rails annotate_rb:models` -
successfully annotated all models including InstallationConfig
4. Verified InstallationConfig model annotations are present and correct
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] My changes generate no new warnings
- [x] New and existing unit tests pass locally with my changes
# Pull Request Template
## Description
Fixes
https://linear.app/chatwoot/issue/CW-5946/fix-brand-installation-name-issue-in-dyte
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
# Pull Request Template
## Description
This PR updates the colors in places that were missed during the color
update migration.
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
## Description
When working with webhooks, it's easy to lose track of which URL is
which. Adding a `name` (optional) column to the webhook model is a
straight-forward solution to make it significantly easier to identify
webhooks.
## Type of change
- [x] New feature (non-breaking change which adds functionality)
## How Has This Been Tested?
Model and controller specs, and also running in production over several
months without any issues.
| Before | After |
| --- | --- |
| <img width="949" height="990" alt="image copy 3"
src="https://github.com/user-attachments/assets/6b33c072-7d16-4a9c-a129-f9c0751299f5"
/> | <img width="806" height="941" alt="image"
src="https://github.com/user-attachments/assets/77f3cb3a-2eb0-41ac-95bf-d02915589690"
/> |
| <img width="1231" height="650" alt="image copy 2"
src="https://github.com/user-attachments/assets/583374af-96e0-4436-b026-4ce79b7f9321"
/> | <img width="1252" height="650" alt="image copy"
src="https://github.com/user-attachments/assets/aa81fb31-fd18-4e21-a40e-d8ab0dc76b4e"
/> |
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [x] Any dependent changes have been merged and published in downstream
modules
## Description
The Articles API was ignoring the `status` parameter when creating new
articles. All articles were forced to be drafts due to a hardcoded
`@article.draft!` call in the controller, even when users explicitly
sent `status: 1` (published) in their API request.
This PR removes the hardcoded draft enforcement and allows the status
parameter to be respected while maintaining backward compatibility.
Fixes#12063
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
**Before:**
- API POST with `status: 1` → Created as draft (ignored parameter)
- API POST without status → Created as draft
**After:**
- API POST with `status: 1` → Created as published ✅
- API POST without status → Created as draft (backward compatible) ✅
- UI creates articles → Still creates as draft (UI doesn't send status)
✅
**Tests run:**
```bash
bundle exec rspec spec/controllers/api/v1/accounts/articles_controller_spec.rb
# 17 examples, 0 failures
```
Updated tests:
1. Changed 2 existing tests that were verifying the broken behavior
(expecting draft when published was sent)
2. Added new test to verify articles default to draft when status is not
provided
3. All existing tests pass, confirming backward compatibility
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
Co-authored-by: Sojan Jose <sojan@pepalo.com>
Previously, the lock key for Instagram used sender_id, which for echo
messages (outgoing) would be the account's own ID. This caused all
outgoing messages to compete for the same lock, creating a bottleneck
during bulk messaging.
The fix introduces contact_instagram_id method that correctly identifies
the contact's ID regardless of message direction:
- For echo messages (outgoing): uses recipient.id (the contact)
- For incoming messages: uses sender.id (the contact)
This ensures each conversation has a unique lock, allowing parallel
processing of webhooks while maintaining race condition protection
within individual conversations.
Fixes lock acquisition errors in Sidekiq when processing bulk Instagram
messages.
Fixes
https://linear.app/chatwoot/issue/CW-5931/p0-mutexapplicationjoblockacquisitionerror-failed-to-acquire-lock-for
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
# Pull Request Template
## Description
This PR includes an update to the Captain navigation structure.
## Route Structure
```javascript
1. captain_assistants_responses_index → /captain/:assistantId/faqs
2. captain_assistants_documents_index → /captain/:assistantId/documents
3. captain_assistants_scenarios_index → /captain/:assistantId/scenarios
4. captain_assistants_playground_index → /captain/:assistantId/playground
5. captain_assistants_inboxes_index → /captain/:assistantId/inboxes
6. captain_tools_index → /captain/tools
7. captain_assistants_settings_index → /captain/:assistantId/settings
8. captain_assistants_guardrails_index → /captain/:assistantId/settings/guardrails
9. captain_assistants_guidelines_index → /captain/:assistantId/settings/guidelines
10. captain_assistants_index → /captain/:navigationPath
```
**How it works:**
1. User clicks sidebar item → Routes to `captain_assistants_index` with
`navigationPath`
2. `AssistantsIndexPage` validates route and gets last active assistant,
if not redirects to assistant create page.
3. Routes to actual page: `/captain/:assistantId/:page`
4. Page loads with correct assistant context
Fixes
https://linear.app/chatwoot/issue/CW-5832/updating-captain-navigation
## Type of change
- [x] New feature (non-breaking change which adds functionality)
## How Has This Been Tested?
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
---------
Co-authored-by: Pranav <pranav@chatwoot.com>
Co-authored-by: Sojan Jose <sojan@pepalo.com>
## Description
Modified the phone number validation in Whatsapp::ChannelCreationService
to check for duplicate phone numbers across ALL accounts, not just
within the current account.
## Type of change
- [ ] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
- Added test coverage for cross-account phone number validation
- Using actual UI flow
<img width="1493" height="532" alt="image"
src="https://github.com/user-attachments/assets/67d2bb99-2eb9-4115-8d56-449e4785e0d8"
/>
## Checklist:
- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
## Description
Refactored the `Message#search_data` method to prevent exceeding
OpenSearch's 1000 field limit during reindex operations.
**Problem:** The previous implementation serialized entire ActiveRecord
objects (Inbox, Sender, Conversation) with all their JSONB fields,
causing dynamic field explosion in OpenSearch. This resulted in
`Searchkick::ImportError` with "Limit of total fields [1000] has been
exceeded".
**Solution:** Whitelisted only necessary fields for search and
filtering, and flattened JSONB `custom_attributes` into key-value pair
arrays to prevent unbounded field creation.
Linked to: CW-5861
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [x] This change requires a documentation update
## How Has This Been Tested?
- Verified rubocop passes with no offenses
- Code review of search field usage from
`enterprise/app/services/enterprise/search_service.rb`
- Analyzed actual search queries to determine required indexed fields
**Still needed:**
- Full reindex test on staging/production environment
- Verify search functionality still works after reindex
- Confirm field count is under 1000 limit
## Changes Made
### Before
- Indexed 1000+ fields (entire AR objects with JSONB)
- `inbox` = full Inbox object (23+ fields + JSONB)
- `sender` = full Contact/User/AgentBot object (10+ fields + JSONB)
- `conversation` = full push_event_data
- Dynamic JSONB keys creating unlimited fields
### After
- ~35-40 controlled fields
- Whitelisted search fields: `content`, `attachment_transcribed_text`,
`email_subject`
- Filter fields: `account_id`, `inbox_id`, `conversation_id`,
`sender_id`, `sender_type`, etc.
- Flattened `custom_attributes`: `[{key, value, value_type}]` format
- Helper methods: `search_conversation_data`, `search_inbox_data`,
`search_sender_data`, `search_additional_data`
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
## Post-merge Steps
After merging, the following steps are required:
1. **Reindex all messages:**
```bash
bundle exec rails runner "Message.reindex"
```
2. **Verify field count:**
```bash
bundle exec rails runner "
client = Searchkick.client
index_name = Message.searchkick_index.name
mapping = client.indices.get_mapping(index: index_name)
fields = mapping.dig(index_name, 'mappings', 'properties')
puts 'Total fields: ' + fields.keys.count.to_s
"
```
3. **Test search functionality** to ensure queries still work as
expected
---------
Co-authored-by: Vishnu Narayanan <iamwishnu@gmail.com>
Co-authored-by: Pranav <pranav@chatwoot.com>
## Description
Implements real-time company auto-association for contacts based on
email domains. This is **Part 2** of the company model production
rollout (CW-5726).
**Task:**
- When a contact is created with a business email, automatically create
and associate a company from the email domain
- When a contact is updated with an email for the first time (email was
previously nil), associate with a company
- Preserve existing company associations when email changes to avoid
user confusion
- Skip free email providers and disposable domains
**Dependencies:**
⚠️ Requires PR #12657 (Part 1: Backfill migration) to be merged first
**Linear ticket:**
[CW-5726](https://linear.app/chatwoot/issue/CW-5726/company-model-setting-it-up-on-production)
## Type of change
- [x] New feature (non-breaking change which adds functionality)
## How Has This Been Tested?
- Service specs: Tests business email detection, company creation,
association logic, edge cases (existing companies, free emails, nil
emails)
- Integration specs: Tests full callback flow for contact create/update
scenarios
- All tests passing: 10 examples, 0 failures
- RuboCop: 0 offenses
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules (PR #12657 pending)
---------
Co-authored-by: Sojan Jose <sojan@pepalo.com>
## Description
Implements company backfill migration infrastructure for existing
contacts. This is **Part 1 of 2** for the company model production
rollout as described in
[CW-5726](https://linear.app/chatwoot/issue/CW-5726/company-model-setting-it-up-on-production).
Creates jobs and services to associate existing contacts with companies
based on their email domains, filtering out free email providers (gmail,
yahoo, etc.) and disposable addresses.
**What's included:**
- Business email detector service with ValidEmail2 (uses
`disposable_domain?` to avoid DNS lookups)
- Per-account batch job to process contacts for one account
- Orchestrator job to iterate all accounts
- Rake task: `bundle exec rake companies:backfill`
~~*NOTE*: I'm using a hard-coded approach to determine if something is a
"business" email by filtering out emails that are usually personal. I've
also added domains that are common to some of our customers' regions.
This should be simpler. I looked into `Valid_Email2` and I couldn't find
anything to dictate whether an email is a personal email or a business
one. I don't think the approach used in the frontend is valid here.~~
UPDATE: Using `email_provider_info` gem instead.
**Pending - Part 2 (separate PR):** Real-time company creation for new
contacts
## Type of change
- [x] New feature (non-breaking change which adds functionality)
## How Has This Been Tested?
```bash
# Run all new tests
bundle exec rspec spec/enterprise/services/companies/business_email_detector_service_spec.rb \\
spec/enterprise/jobs/migration/company_account_batch_job_spec.rb \\
spec/enterprise/jobs/migration/company_backfill_job_spec.rb
# Run RuboCop
bundle exec rubocop enterprise/app/services/companies/business_email_detector_service.rb \\
enterprise/app/jobs/migration/company_account_batch_job.rb \\
enterprise/app/jobs/migration/company_backfill_job.rb \\
lib/tasks/companies.rake
```
**Performance optimization:**
- Uses `disposable_domain?` instead of `disposable?` to avoid DNS MX
lookups (discovered via tcpdump analysis - `disposable?` was making
network calls for every email, causing 100x slowdown)
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
---------
Co-authored-by: Sojan Jose <sojan@pepalo.com>
# Pull Request Template
## Description
This PR makes the contacts bulk action bar sticky while scrolling.
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
### Screenshots
<img width="1080" height="300" alt="image"
src="https://github.com/user-attachments/assets/21f8f3c6-813e-4ef6-b40a-8dd14e6ffb26"
/>
<img width="1080" height="300" alt="image"
src="https://github.com/user-attachments/assets/bb939f1d-9a13-4f9f-953d-b9872c984b74"
/>
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
# Pull Request Template
## Description
**This PR includes:**
1. Added URL-based filter persistence for the responses pages, including
page and search parameters.
2. Introduced a new empty state variant for pending FAQs — without a
backdrop and with a “Clear Filters” option.
3. Made the actions, filter, and search row remain fixed at the top
while scrolling.
Fixes
https://linear.app/chatwoot/issue/CW-5852/improvements-in-pending-faqs
## Type of change
- [x] New feature (non-breaking change which adds functionality)
## How Has This Been Tested?
### Loom video
https://www.loom.com/share/1d9eee68c0684f0ab05e08b4ca1e0ce9
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
# Pull Request Template
## Description
Fixes https://github.com/chatwoot/chatwoot/issues/12553
Heroku build was failing due to `omniauth` version mismatch. Also, added
`NODE_OPTIONS=--max-old-space-size=4096` to handle OOM during Vite
build.
## Type of change
Please delete options that are not relevant.
- [x] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
- Tested on heroku
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [x] Any dependent changes have been merged and published in downstream
modules
# Pull Request Template
## Description
**This PR includes,**
- Added new pending FAQs view with approve/edit/delete actions for each
response.
- Implemented banner notification showing pending FAQ count on main
approved responses page.
- Created dedicated route for pending FAQs review at
/captain/responses/pending.
- Added automatic pending count updates when switching assistants or
routes.
- Modified ResponseCard component to show action buttons instead of
dropdown in pending view.
Fixes
https://linear.app/chatwoot/issue/CW-5833/pending-faqs-in-a-different-ux
## Type of change
- [x] New feature (non-breaking change which adds functionality)
## How Has This Been Tested?
### Loom video
https://www.loom.com/share/5fe8f79b04cd4681b9360c48710b9373
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
---------
Co-authored-by: Pranav <pranav@chatwoot.com>
## Summary
- Fix captain response builder not getting triggered for cases where
responses are created as completed.
## Testing Instructions
- Test articles with firecrawl
- Test articles without firecrawl
- Test PDF documents
---------
Co-authored-by: Pranav <pranav@chatwoot.com>
## Description
Fixes timezone offset parameter in V2 reports API that was broken by DST
transitions. The issue occurred when UK DST ended on October 26, 2025,
causing the test to fail starting October 27th.
~~**Initial diagnosis:** The root cause was that
`timezone_name_from_offset` used `zone.now.utc_offset` to match
timezones, which changes based on the current date's DST status rather
than the data being queried.~~
**Actual root cause:** The test was accidentally passing before DST
transition. During BST, `timezone_name_from_offset(0)` matched "Azores"
(UTC-1) instead of "Edinburgh" (UTC+0), and the -1 hour offset
coincidentally split midnight data into [1,5]. After DST ended, it
correctly matched "Edinburgh" (UTC+0), but this grouped all
conversations into one day [6], exposing that the test data was flawed.
The real issue: Test data created all 6 conversations starting at
midnight on a single day, which cannot produce a [1,5] split in true
UTC.
Fixes CW-5846
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [ ] This change requires a documentation update
## How Has This Been Tested?
**Test that was failing:**
```bash
bundle exec rspec spec/controllers/api/v2/accounts/reports_controller_spec.rb:25
```
**Changes:**
~~1. Fixed `timezone_name_from_offset` to use January 1st as reference
date instead of current date~~
~~2. Converted timezone string to `ActiveSupport::TimeZone` object for
`group_by_period` compatibility~~
**Revised approach:**
1. Freeze test time to January 2024 using `travel_to`, making timezone
matching deterministic and aligned with test data period
2. Start test conversations at 23:00 instead of midnight to properly
span two days and test timezone boundary grouping
3. Keep `zone.now.utc_offset` (correct behavior for real users during
DST)
**Why this works:**
- Test runs "in January 2024" → `zone.now.utc_offset` returns January
offsets consistently
- Offset `-8` correctly matches Pacific Standard Time (UTC-8 in January)
- Real users in PDT (summer) with offset `-7` → correctly match Pacific
Daylight Time
- No production impact, test is deterministic year-round
**Verification:**
- Test now passes consistently regardless of current DST status
- Timezone matching works correctly for real users during DST periods
- Reports correctly group data by timezone offset across all seasons
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [x] Any dependent changes have been merged and published in downstream
modules
---------
Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
### Problem
WhatsApp Cloud channels already handle Brazil/Argentina phone number
format mismatches (PRs #12492, #11173), but Twilio WhatsApp channels
were creating duplicate contacts
when:
- Template sent to new format: `whatsapp:+5541988887777` (13 digits)
- User responds from old format: `whatsapp:+554188887777` (12 digits)
### Solution
The solution extends the existing phone number normalization
infrastructure to support both WhatsApp providers while handling their
different payload formats:
### Provider Format Differences
- **WhatsApp Cloud**: `wa_id: "919745786257"` (clean number)
- **Twilio WhatsApp**: `From: "whatsapp:+919745786257"` (prefixed
format)
### Test Coverage
#### Brazil Phone Number Tests
**Case 1: New Format (13 digits with "9")**
- **Test 1**: No existing contact → Creates new contact with original
format
- **Test 2**: Contact exists in same format → Appends to existing
conversation
**Case 2: Old Format (12 digits without "9")**
- **Test 3**: Contact exists in old format → Appends to existing
conversation
- **Test 4** *(Critical)*: Contact exists in new format, message in old
format → Finds existing contact, prevents duplicate
- **Test 5**: No contact exists → Creates new contact with incoming
format
#### Argentina Phone Number Tests
**Case 3: With "9" after country code**
- **Test 6**: No existing contact → Creates new contact
- **Test 7**: Contact exists in normalized format → Uses existing
contact
**Case 4: Without "9" after country code**
- **Test 8**: Contact exists in same format → Appends to existing
- **Test 9**: No contact exists → Creates new contact
Fixes
https://linear.app/chatwoot/issue/CW-5565/inconsistencies-for-mobile-numbersargentina-brazil-and-mexico-numbers
**Problem**
Slack webhook processing was failing with 500 errors due to database
timeouts. The query `Conversation.where(identifier:
params[:event][:thread_ts]).first` was performing full table scans and
hitting PostgreSQL statement timeout.
**Solution**
Added database index on conversations.identifier and account_id.
