Function cleanupStaleLocks

cleanupStaleLocks(
metaPaths: string[],
logger?: { warn: (obj: Record<string, unknown>, msg: string) => void },
): void
Clean up stale lock files on startup.

For each .meta directory found via the provided paths:
- If lock contains PID-only data (synthesis incomplete), delete it.
- If lock contains staged result (_id present), log warning and delete.
Parameters
- metaPaths: string[]
  Array of .meta directory paths to check.
- Optionallogger: { warn: (obj: Record<string, unknown>, msg: string) => void }
  Optional logger for warnings.
Returns void
- Defined in packages/service/src/lock.ts:141