- Add include_archived parameter to TaskService.list_tasks()
- Service now conditionally applies archived filter based on parameter
- Add 'archived' field to task DTO for client visibility
- Update API endpoints to pass include_archived down to service
- Remove redundant client-side filtering in API layer
- Fix type hints in integration tests (dict[str, Any] | None)
- Use pytest.skip() instead of return for proper test reporting
These fixes address the functional bug identified by CodeRabbit where
archived tasks couldn't be retrieved even when explicitly requested.
c19e85f0c9