openai: cache httpx client (#31260)

Commit

260 days ago

openai: cache httpx client (#31260) ![Screenshot 2025-05-16 at 3 49 54 PM](https://github.com/user-attachments/assets/4b377384-a769-4487-b801-bd1aa0ed66c1) Co-authored-by: Sydney Runkle <54324534+sydney-runkle@users.noreply.github.com>