The runConvoyCheck function was running `gt convoy check` without
the convoy ID, which checked all open convoys. Now it passes the
specific convoy ID to check only the relevant convoy, as specified
in the requirements.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Per PRIMING.md principle "Redundant Monitoring Is Resilience", add convoy
completion checks to Witness and Refinery for redundant observation:
- New internal/convoy/observer.go with shared CheckConvoysForIssue function
- Witness: checks convoys after successful polecat nuke in HandleMerged
- Refinery: checks convoys after closing source issue in both success handlers
Multiple observers closing the same convoy is idempotent - each checks if
convoy is already closed before running `gt convoy check`.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>