## Linear task:
https://linear.app/chatwoot/issue/CW-6318/searchkickimporterror-type-=-mapper-parsing-exception-reason-=-failed
## Description
Fixes Elasticsearch `mapper_parsing_exception` errors that occur when
`campaign_id` contain non-numeric string values
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
- Unit tests
- use a local OpenSearch 3.4.0 cluster to verify actual indexing
behavior.
## 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
<!-- CURSOR_SUMMARY -->
---
> [!NOTE]
> Removes `campaign_id` from the message search index payload to
simplify `additional_attributes`, keeping only `automation_rule_id`.
>
> - `Messages::SearchDataPresenter#additional_attributes_data` now
returns only `automation_rule_id`
> - Specs updated to stop asserting `campaign_id` and continue
validating `automation_rule_id` and email subject handling
>
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
5a9c8eb794a044e3f258b644f67a6731de9e904c. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->
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