- Created migration 930_add_missing_foreign_keys.sql
- Added FK constraints for legacy fields: tracks.user_id, rooms.owner_id, messages.user_id, messages.parent_id
- Added FK constraint for audit_logs.user_id
- All constraints use ON DELETE SET NULL for legacy fields and audit_logs
- Verified primary foreign keys already have proper constraints in existing migrations
- Models already have proper GORM foreignKey tags
Phase: PHASE-1
Priority: P0
Progress: 12/267 (4.5%)
