- Implements bd stale command to show issues with execution_state where executor is dead/stopped
- Adds --release flag to automatically release orphaned issues
- Adds --threshold flag to customize heartbeat staleness threshold (default: 300s/5min)
- Handles missing executor instances (LEFT JOIN) for cases where executor was deleted
- Adds QueryContext and BeginTx helper methods to SQLiteStorage for advanced queries
- Fixes ExternalRef comparison bug in import_shared.go (pointer vs string)
- Removes unused imports in import.go
Resolves vc-124
790233f748