chore(worker): add PostHog events for repo index sync jobs

[brendan-kellam]

Summary

• Add new PostHog events to track repo index job success and failure (backend_repo_index_job_completed, backend_repo_index_job_failed)
• Add code host type field to existing connection sync events (backend_connection_sync_job_completed, backend_connection_sync_job_failed)

Test plan

• Verify backend builds successfully
• Test that events are captured when repo index jobs complete/fail
• Test that events are captured when connection sync jobs complete/fail

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Enhanced repository indexing telemetry with new events tracking job completion and failure status, including job type and repository identifiers
  • Improved connection synchronization telemetry to include code host type information
  • Updated telemetry event definitions for more accurate monitoring

[coderabbitai]

Walkthrough

The PR adds PostHog telemetry events for repository index job completion and failure, and includes code host type information in connection sync job events. It modifies event type definitions, updates connection sync handlers to capture and emit connection type, and adds event emissions to repo index job lifecycle methods.

Changes

Cohort / File(s)	Summary
Event Type Definitions packages/backend/src/posthogEvents.ts	Removed repo_created and repo_deleted events; updated backend_connection_sync_job_failed and backend_connection_sync_job_completed to include type: string; added new events backend_repo_index_job_completed and backend_repo_index_job_failed with repoId, jobType, and type fields.
Connection Sync Telemetry packages/backend/src/connectionManager.ts	Updated Prisma select statements to include connection object in update results; extracts connection config and includes type field in backend_connection_sync_job_completed and backend_connection_sync_job_failed telemetry events.
Repo Index Telemetry packages/backend/src/repoIndexManager.ts	Added telemetry event emissions on job completion (backend_repo_index_job_completed) and failure (backend_repo_index_job_failed) with repoId, jobType, and type fields sourced from job data.
Changelog CHANGELOG.md	Added release note documenting new PostHog events for repo index job success/failure and code host type in connection sync events.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~22 minutes

Possibly related PRs

• chore(web): Store pushedAt field in Repo table #790: Modifies repoIndexManager job-completion and failure handling to update pushedAt timestamps, overlapping with lifecycle methods that now emit telemetry events.
• chore(worker): Migrate off of groupmq #860: Refactors the same methods in connectionManager.ts and repoIndexManager.ts that this PR modifies for telemetry and event-field additions.

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title focuses on 'repo index sync jobs' but the changeset adds events for both repo index jobs AND connection sync jobs, making it incomplete and partially misleading.	Update title to reflect both changes: 'chore(worker): add PostHog events for repo index and connection sync jobs' to accurately represent all modifications in the changeset.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch brendan-kellam/add-posthog-events-repo-index-sync

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