Add an explicit recovery operation for same-claimant dirty registered
worktrees under malformed PID-less durable locks, with crash-safe journals,
dirty byte preservation, path-level conflict detection, and live session
binding. PID-less locks are never treated as live merely because expiry is
absent.
Closes#860
Co-Authored-By: Grok 4.5 (xAI) <[email protected]>
