- Fix CRITICAL: use parameterized INTERVAL arithmetic (%(days)s * INTERVAL '1 day') instead of string interpolation inside SQL literal - Use asyncio.gather() for parallel query execution in get_analytics() - Add range upper bound (max 365 days) to prevent DoS via full-table scans - Add thread_id validation (alphanumeric, max 128 chars) in replay API - Sanitize error messages to not reflect user input