Add exponential backoff retry for BEGIN IMMEDIATE transactions to handle
concurrent write load without spurious failures.
Changes:
- Add IsBusyError() helper to detect database locked errors
- Add beginImmediateWithRetry() with exponential backoff (10ms, 20ms, 40ms, 80ms, 160ms)
- Update CreateIssue and CreateIssuesInBatch to use retry logic
- Add comprehensive tests for error detection and retry behavior
- Handles context cancellation between retry attempts
- Fails fast on non-busy errors
This eliminates spurious SQLITE_BUSY failures under normal concurrent usage
while maintaining proper error handling for other failure modes.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
CHANGES:
1. Merge logic (internal/merge/merge.go):
- Added mergeStatus() enforcing closed ALWAYS wins over open
- Fixed closed_at handling: only set when status='closed'
- Changed deletion handling: deletion ALWAYS wins over modification
2. Deletion tracking (cmd/bd/snapshot_manager.go):
- Updated ComputeAcceptedDeletions to accept all merge deletions
- Removed "unchanged locally" check (deletion wins regardless)
3. FK constraint helper (internal/storage/sqlite/util.go):
- Added IsForeignKeyConstraintError() for bd-koab
- Detects FK violations for graceful import handling
TESTS UPDATED:
- TestMergeStatus: comprehensive status merge tests
- TestIsForeignKeyConstraintError: FK constraint detection
- bd-pq5k test: validates no invalid state (status=open with closed_at)
- Deletion tests: reflect new deletion-wins behavior
- All tests pass ✓
This ensures issues never get stuck in invalid states and prevents
the insane situation where issues never die!
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
