Fix NOT NULL constraint violations in merchant_staff table: - Add permissions = 0 (default no permissions) - Add user_id = Guid.Empty (placeholder until linked) - Verified: CREATE→UPDATE→DELETE all working
Fix NOT NULL constraint violations in merchant_staff table: - Add permissions = 0 (default no permissions) - Add user_id = Guid.Empty (placeholder until linked) - Verified: CREATE→UPDATE→DELETE all working