feat(cloud): harden multi-tenant runtime resources

pytest.ini

@@ -13,6 +13,12 @@ testpaths = tests
 # Asyncio configuration
 asyncio_mode = auto
 
+# Resource leaks are often reported during object finalization and wrapped by
+# pytest. Keep both forms fatal so --disable-warnings cannot hide them.
+filterwarnings =
+    error::ResourceWarning
+    error::pytest.PytestUnraisableExceptionWarning
+
 # Output options
 addopts =
     -v