fix(llm): ensure store=False is passed to Codex Responses API (#7089)

Forces store: false into the extra_body payload for Codex-style models
so that LiteLLM successfully passes it down to the ChatGPT Responses
API backend, fixing the BadRequestError.

Fixes #7056.

Original investigation and first PR by @Darshan174 (#7065).

Co-authored-by: Darshan174 <Darshan002321@gmail.com>

core/framework/llm/litellm.py

@@ -1959,6 +1959,10 @@ class LiteLLMProvider(LLMProvider):
         if self._codex_backend:
             kwargs.pop("max_tokens", None)
             kwargs.pop("stream_options", None)
+            # Pass store directly to OpenAI in case litellm drops it as unknown
+            if "extra_body" not in kwargs:
+                kwargs["extra_body"] = {}
+            kwargs["extra_body"]["store"] = False
 
         request_summary = _summarize_request_for_log(kwargs)
         logger.debug(