groblegark d037158624 fix(dolt): add lock retry and stale lock cleanup for operational reliability (#1260) ...

Adds operational improvements to the Dolt storage backend for increased
reliability in production environments with concurrent clients:

1. Lock retry with exponential backoff:
   - Add LockRetries and LockRetryDelay config options
   - Automatic retry on lock contention (default: 30 retries, ~6s window)
   - Exponential backoff starting at 100ms
   - Handles transient format version errors during manifest updates

2. Stale lock file cleanup:
   - Detect and clean orphaned .dolt/noms/LOCK files on startup
   - Prevents "database is read only" errors after crashes
   - Only removes empty locks older than 5 seconds

3. Transient error detection:
   - isTransientDoltError() detects retryable conditions
   - isLockError() identifies lock contention scenarios
   - cleanupStaleDoltLock() safely removes orphaned locks

These improvements address common issues in multi-process environments
where the Dolt embedded driver creates exclusive locks that persist
after unexpected termination.

Co-authored-by: upstream_syncer <matthew.baker@pihealth.ai>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-22 13:04:56 -08:00

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