PR Draft Summary Purpose Produce the PR-ready summary required in this repository after substantive code work is complete: a concise summary plus a PR-ready title and draft description that begins with "This pull request <verb ...". The block should be ready to paste into a PR for openai-agents-python. When to Trigger - The task for this repo is finished (or ready for review) and it touched runtime code, tests, examples, docs with behavior impact, or build/test configuration. - Treat this as the default final handoff step for substantive code work. Run it after any required verification or ch…