* trying tout gpt-5.1-codex
* add unit test for message content
* try to support multimodal
* remove ValueError and add logging on stream error
* prevent stream termination from api spec implementation errors
* fix: remove final_response references from non-Responses API interfaces
* fix: add diagnostic attributes to SimpleOpenAIResponsesStreamingInterface
* fix: remove final_response from SimpleOpenAIStreamingInterface (Chat Completions API)