feat: Ungate file upload for simple MIME types even without Mistral API key (#2898)

examples/docs/agent_basic.py

@@ -19,7 +19,7 @@ agent_state = client.agents.create(
     ],
     # set automatic defaults for LLM/embedding config
     model="openai/gpt-4o-mini",
-    embedding="openai/text-embedding-ada-002",
+    embedding="openai/text-embedding-3-small",
 )
 print(f"Created agent with name {agent_state.name} and unique ID {agent_state.id}")