feat: Add automatic favicon fetching for companies (#13013)

## Summary

This Enterprise-only feature automatically fetches a favicon for
companies created with a domain, and adds a batch task to backfill
missing avatars for existing companies. The flow only targets companies
that do not already have an attached avatar, so existing avatars are
left untouched.


## Demo 



https://github.com/user-attachments/assets/d050334e-769f-4e46-b6e7-f7423727a192



## What changed

- Added `Avatar::AvatarFromFaviconJob` to build a Google favicon URL
from the company domain and fetch it through `Avatar::AvatarFromUrlJob`
- Triggered favicon fetching from `Company` with `after_create_commit`
- Added `Companies::FetchAvatarsJob` to batch existing companies that
are missing avatars
- Added `companies:fetch_missing_avatars` under `enterprise/lib/tasks`
- Kept the company-specific implementation inside the Enterprise
boundary
- Stubbed the new favicon request in unrelated specs that now hit this
callback indirectly
- Updated a couple of CI-sensitive specs that were failing due to
callback side effects / reload-safe exception assertions

## How to verify

1. Create a company in Enterprise with a valid domain and no avatar.
2. Confirm that a favicon-based avatar gets attached shortly after
creation.
3. Create another company with a domain and an avatar already attached.
4. Confirm that the existing avatar is not replaced.
5. Run `companies:fetch_missing_avatars`.
6. Confirm that existing companies without avatars get one, while
companies that already have avatars remain unchanged.

## Notes

- This change does not refresh or overwrite existing company avatars
- Favicon fetching only runs for companies with a present domain
- The branch includes the latest `develop`

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Sojan Jose <sojan@pepalo.com>

spec/enterprise/jobs/avatar/avatar_from_favicon_job_spec.rb

@@ -0,0 +1,27 @@
+require 'rails_helper'
+
+RSpec.describe Avatar::AvatarFromFaviconJob do
+  let(:company) { create(:company, domain: 'wikipedia.org') }
+  let(:favicon_url) { 'https://www.google.com/s2/favicons?domain=wikipedia.org&sz=256' }
+
+  it 'calls AvatarFromUrlJob with Google Favicon URL' do
+    expect(Avatar::AvatarFromUrlJob).to receive(:perform_now).with(company, favicon_url)
+    described_class.perform_now(company)
+  end
+
+  it 'does not call AvatarFromUrlJob when domain is blank' do
+    company.update(domain: '')
+    expect(Avatar::AvatarFromUrlJob).not_to receive(:perform_now)
+    described_class.perform_now(company)
+  end
+
+  it 'does not call AvatarFromUrlJob when avatar is already attached' do
+    company.avatar.attach(
+      io: Rails.root.join('spec/assets/avatar.png').open,
+      filename: 'avatar.png',
+      content_type: 'image/png'
+    )
+    expect(Avatar::AvatarFromUrlJob).not_to receive(:perform_now)
+    described_class.perform_now(company)
+  end
+end

spec/enterprise/jobs/companies/fetch_avatars_job_spec.rb

@@ -0,0 +1,25 @@
+require 'rails_helper'
+
+RSpec.describe Companies::FetchAvatarsJob do
+  let(:account) { create(:account) }
+  let!(:company_with_avatar) { create(:company, account: account, domain: 'example.com') }
+  let!(:company_without_avatar) { create(:company, account: account, domain: 'wikipedia.org') }
+  let!(:company_no_domain) { create(:company, account: account, domain: nil) }
+
+  before do
+    # Attach avatar to first company
+    company_with_avatar.avatar.attach(
+      io: Rails.root.join('spec/assets/avatar.png').open,
+      filename: 'avatar.png',
+      content_type: 'image/png'
+    )
+  end
+
+  it 'queues Avatar::AvatarFromFaviconJob only for companies without avatars' do
+    expect(Avatar::AvatarFromFaviconJob).to receive(:perform_later).with(company_without_avatar).once
+    expect(Avatar::AvatarFromFaviconJob).not_to receive(:perform_later).with(company_with_avatar)
+    expect(Avatar::AvatarFromFaviconJob).not_to receive(:perform_later).with(company_no_domain)
+
+    described_class.perform_now(account.id)
+  end
+end

spec/enterprise/models/conversation_spec.rb

@@ -6,9 +6,14 @@ RSpec.describe Conversation, type: :model do
   end
 
   describe 'SLA policy updates' do
-    let!(:conversation) { create(:conversation) }
+    let(:conversation) { create(:conversation) }
     let!(:sla_policy) { create(:sla_policy, account: conversation.account) }
 
+    before do
+      stub_request(:get, %r{\Ahttps://www\.gravatar\.com.*}).to_return(status: 404)
+      stub_request(:get, %r{\Ahttps://www\.google\.com/s2/favicons.*}).to_return(status: 404)
+    end
+
     it 'generates an activity message when the SLA policy is updated' do
       conversation.update!(sla_policy_id: sla_policy.id)