fix: allow bare generic fixtures in compatibility checks

Author: marcuswood-oai

scripts/pyrightconfig.breaking-changes.json

@@ -6,6 +6,9 @@
     "../tests/test_legacy_response.py"
   ],
   "typeCheckingMode": "strict",
+  // Some runtime tests intentionally use bare containers. Check caller
+  // compatibility without requiring complete generic annotations in fixtures.
+  "reportMissingTypeArgument": false,
   "pythonVersion": "3.10",
   "reportImplicitOverride": true,
   "reportOverlappingOverload": false,