hailin 54061b4c16 feat(mpc-system): add event sourcing for session tracking ... - Add SessionEventRepository interface for append-only event storage - Implement PostgreSQL session_event_repo with immutable event log - Add database migration for session_events table with indexes - Record events for keygen and sign session creation - Record events for signing-config APIs (set, update, clear) - Wire up sessionEventRepo in main.go and account handler - Update API documentation with event sourcing design 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>		2025-12-05 23:31:04 -08:00
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http	feat(mpc-system): add event sourcing for session tracking	2025-12-05 23:31:04 -08:00