no explicit caching for OpenAI

Author: recursix

src/agentlab/llm/response_api.py

@@ -154,6 +154,9 @@ def handle_tool_call(self, content):
             output.append({"role": "user", "content": tail_content})
         return output
 
+    def mark_all_previous_msg_for_caching(self) -> List[Message]:
+        pass
+
 
 class AnthropicAPIMessageBuilder(MessageBuilder):