🚀 Describe the new functionality needed

In Responses API, you can tag a response with metadata that gets added to the response object returned from that request. This doesn't do anything in the backend, but does allow you to catalog response data in your own data collection/logging/event tracking systems.

Requirements

• Add the metadata field to the create request and response object
• Copy the metadata object from the user request to the response object.

💡 Why is this needed? What if we don't build it?

Feature Gap.

Other thoughts

Good First Issue