Migration

From a plain FastAPI app

1. Add ObserverMiddleware
2. Start with the default ObserverConfig
3. Enable request or response body capture only when you need it
4. Add filters to reduce log noise

Existing loggers

If your app already configures logging, use build_logger() to create a dedicated observer logger and keep propagation disabled.

Storage-backed setups

• Use JsonFileEventStore for a simple local trail
• Use SQLiteEventStore when you need queryable persistence
• Use InMemoryEventStore for tests and ephemeral dashboards