Add support for new Response properties

[ShivangiReja]

This PR adds support for the latest Response properties:

• max_tool_calls
• safety_identifier
• top_logprobs
• conversation

[joseharriaga]

This property also needs to be added to the Response output model below.

There is an interesting situation here though:

• In the API reference docs, this property is an object with a single "id" property (just like we saw in the input).
• However, in the latest spec, this property is defined as an object with the "id" property, but with a few other properties too, like "metadata", "created_at", etc.

So now, the question is: Which one is correct?

To find the answer, could you verify by testing against the service and seeing what it returns? Based on what you find, I see two paths:

1. If it returns just the "id" property, we can expose this property as a single string property called ConversationId exactly like you did in the input model. Additionally, we should also file a bug against the latest spec.
2. But if it returns more than that just the "id", then we might need to expose a full Conversation object with all the other properties.

[ShivangiReja]

I tested this and the conversation object in the response only contains the id field, none of the additional properties from the latest spec show up.

I’ve updated the Response output model accordingly and created an issue https://github.com/microsoft/openai-openapi-pr/issues/283 for the spec mismatch.