Update the repo-run examples that still hardcoded gpt-5 so they use the same gpt-5.4 path already succeeding elsewhere in this runtime.
This fixes the quickstart, lifecycle, multimodal, parity, CLI, retry, and kitchen-sink examples that were failing with the runtime-side tool_search compatibility error under gpt-5.
Validation:
- ran all 25 sdk/python example scripts locally
- no examples reported failed turns after the model update
- remaining empty-item outputs are limited to 02_turn_run and 03_turn_stream_events for follow-up investigation
Co-authored-by: Codex <noreply@openai.com>
