CRITICAL BUG FIX: Play locks were never released on exceptions, causing
permanent user lockouts. Found 13 stuck plays in production.
Changes:
1. Added lock_play parameter to checks_log_interaction() (default True)
2. Removed unnecessary locks from read-only commands:
- /settings-ingame (game settings, not play state)
- /show-card defense (read-only display)
- /substitute commands (just show UI, lock in callback)
3. Added safe_play_lock() context manager for automatic lock release
4. Added play locking to substitution callbacks:
- SelectBatterSub.callback()
- SelectReliefPitcher.callback()
5. Global error handler now releases stuck locks automatically
Architecture:
- Commands that display UI or read data: No lock
- Commands that modify play state: Lock at last possible moment
- 3-layer defense: manual release, context manager, global handler
Resolves race condition from concurrent play modifications.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>