SIENTIAPDE-1646

Fix flaky shutdown assertions in test suite

GC-collected instances during tests also invoke patched shutdown,
making assert_called_once_with flaky. Count calls for this instance
specifically instead of asserting total call count.

tests/laborious/activities/test_gates.py

@@ -991,7 +991,8 @@ def test_close_disposes_minio_repository(mock_shutdown):
     gates.close()
     minio.close.assert_called_once()
     assert gates.minio_repository is None
-    mock_shutdown.assert_called_once_with(gates)
+    # Other instances collected by GC during the test also hit the patched shutdown.
+    assert mock_shutdown.call_args_list.count(call(gates)) == 1
 
 
 @patch.object(SientiaMonitoring, 'shutdown')
@@ -1004,4 +1005,5 @@ def test_close_without_minio_repository(mock_shutdown):
         metrics_controller=MagicMock(spec=MetricsController),
     )
     gates.close()
-    mock_shutdown.assert_called_once_with(gates)
+    # Other instances collected by GC during the test also hit the patched shutdown.
+    assert mock_shutdown.call_args_list.count(call(gates)) == 1