feat: implement changelog sync events and payloads for nomad devices

[MohamadJaara]

PR Submission Checklist for internal contributors

• The PR Title
  • conforms to semantic commit style
  • contains a JIRA issue number like SQPIT-764 (replace SQPIT-XXXX)
  • answers what this PR will do

Suggested title:
feat(remote-backup): expose proto-ready changelog event stream from message query #SQPIT-XXXX

• The PR Description
  • filled relevant parts

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What's new in this PR?

Disclaimer

Most of the diff is mapper + data class reshaping, so PR size looks bigger than the actual behavior change.

Issues

• We needed one convenient stream/query returning the latest changelog events already enriched for proto encoding.
• Consumers needed typed events instead of a single generic row model.

Solutions

• Added/used a compact query for latest pending changelog events with minimal joins (no MessageDetails view).
• Exposed results as sealed ChangeLogSyncEvent types.
• Extracted mapping into RemoteBackupChangeLogMapper.
• Enforced non-null message_id for message-scoped event mapping.

Dependencies

None.

Needs releases with:

• GitHub link to other pull request

Testing

Test Coverage

• I have added/updated automated tests

How to Test

Notes

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PR Post Submission Checklist for internal contributors (Optional)

• Wire's Github Workflow has automatically linked the PR to a JIRA issue

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PR Post Merge Checklist for internal contributors

• If any sort of configuration variable was introduced by this PR, it has been added to the relevant docs and CI jobs have been updated.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud