Fix typing error in ingestion strategy

Author: frankie567

src/polar_sdk/ingestion/strategies/pydantic_ai.py

@@ -28,6 +28,10 @@ def ingest(  # pylint: disable=W
         :param metadata: Extra metadata to include with the event.
         """
         usage = result.usage()
+        additional_metadata: dict[str, Any] = {
+            **self._metadata,
+            **metadata,
+        }
         self._ingestion.ingest(
             {
                 "name": self.event_name,
@@ -37,8 +41,7 @@ def ingest(  # pylint: disable=W
                     "response_tokens": usage.response_tokens or 0,
                     "total_tokens": usage.total_tokens or 0,
                     "requests": usage.requests or 0,
-                    **self._metadata,
-                    **metadata,
+                    **additional_metadata,
                 },
             }
         )