fix(closes OPEN-10593): openAI parse responses not getting patched

[gustavocidornelas]

Pull Request

Summary

Extends trace_openai to also patch client.responses.parse, which was previously invisible to tracing. Any call to responses.parse (used for structured output via Pydantic models) now produces a chat_completion step in the active trace, consistent with how responses.create is already handled.

Changes

• Added patching of client.responses.parse in trace_openai() inside openai_tracer.py, reusing the existing handle_responses_non_streaming_create handler
• Guard with hasattr(client.responses, "parse") to maintain compatibility with older SDK versions that may not expose the method

Context

OPEN-10593: OpenAI parse responses not getting patched

Testing

• Manual testing