tests/gateway/test_clean_shutdown_marker.py::TestSuspendRecentlyActive::test_suspends_recently_active_sessions
tests/gateway/test_clean_shutdown_marker.py::TestSuspendRecentlyActive::test_does_not_suspend_old_sessions
tests/gateway/test_clean_shutdown_marker.py::TestSuspendRecentlyActive::test_already_resume_pending_not_double_counted
tests/gateway/test_clean_shutdown_marker.py::TestCleanShutdownMarker::test_marker_written_on_graceful_stop
tests/gateway/test_clean_shutdown_marker.py::TestCleanShutdownMarker::test_marker_skips_suspension_on_startup
tests/gateway/test_clean_shutdown_marker.py::TestCleanShutdownMarker::test_no_marker_triggers_suspension
tests/gateway/test_clean_shutdown_marker.py::TestCleanShutdownMarker::test_marker_written_on_restart_stop