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hailin b72268c1ce feat(mpc-system): implement optimistic locking for session updates 
Implement version-based optimistic locking to prevent concurrent update conflicts
when multiple parties simultaneously report completion during keygen operations.

Changes:
- Add version column to mpc_sessions table (migration 004)
- Add Version field to MPCSession entity
- Define ErrOptimisticLockConflict error
- Update SessionPostgresRepo.Update() to check version and increment on success
- Add automatic retry logic (max 3 attempts) to ReportCompletionUseCase
- Update Save and all query methods (FindByStatus, FindExpired, etc.) to handle version field

This replaces pessimistic locking (FOR UPDATE) with optimistic locking using
the industry-standard pattern: WHERE version = $n and checking rowsAffected.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
 		2025-12-06 04:16:32 -08:00
.claude refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing 2025-12-05 08:11:28 -08:00
backend feat(mpc-system): implement optimistic locking for session updates 2025-12-06 04:16:32 -08:00
docs refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing 2025-12-05 08:11:28 -08:00
frontend refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing 2025-12-05 08:11:28 -08:00
kubernetes . 2025-11-25 10:29:24 +08:00
scripts . 2025-11-25 10:29:24 +08:00
tests . 2025-11-25 10:29:24 +08:00
.gitignore first commit 2025-11-23 21:21:44 -08:00
README.md first commit 2025-11-23 21:21:44 -08:00
docker-compose.yml first commit 2025-11-23 21:21:44 -08:00

README.md