tests/gateway/test_pending_drain_no_recursion.py::test_in_band_drain_does_not_grow_stack
tests/gateway/test_pending_drain_no_recursion.py::test_in_band_drain_preserves_active_session_guard
tests/gateway/test_pending_drain_no_recursion.py::test_normal_path_releases_session_guard
tests/gateway/test_pending_drain_no_recursion.py::test_drain_task_cancellation_releases_session
tests/gateway/test_pending_drain_no_recursion.py::test_late_arrival_drain_still_fires_when_no_in_band_drain