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hailin aab88834f9 fix(coordinator): prevent lost updates in concurrent participant status changes 
Fix critical concurrency bug where simultaneous ReportCompletion calls from
multiple parties could cause lost database updates. Changed from UPSERT-all
to UPDATE-individual pattern to ensure each participant status update is
atomic and won't be overwritten by concurrent transactions.

Before: All participants were UPSERTed in single transaction, causing
last-commit-wins behavior that lost earlier status updates.

After: Each participant is UPDATEd individually using UPDATE...WHERE, then
INSERT only if row doesn't exist. This prevents concurrent updates to
different participants from conflicting.

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

Co-Authored-By: Claude <noreply@anthropic.com>
 		2025-12-06 01:35:38 -08:00
.claude refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing 2025-12-05 08:11:28 -08:00
backend fix(coordinator): prevent lost updates in concurrent participant status changes 2025-12-06 01:35:38 -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