✨ Add metadata support to OpenAIChat (#2146)

![image](https://github.com/user-attachments/assets/8afc75cd-53ff-4540-a1ad-2d4b598fa6ad)


## Changes 🔄
Add metadata parameter to OpenAIChat's request_params

- #2145

libs/agno/agno/models/openai/chat.py

@@ -182,6 +182,7 @@ def request_kwargs(self) -> Dict[str, Any]:
             "top_p": self.top_p,
             "extra_headers": self.extra_headers,
             "extra_query": self.extra_query,
+            "metadata": self.metadata
         }
         # Filter out None values
         request_params = {k: v for k, v in base_params.items() if v is not None}