test: fix tests

ref: N25B-401

test/unit/agents/llm/test_llm_agent.py

@@ -18,6 +18,12 @@ def mock_httpx_client():
         yield mock_client
 
 
+@pytest.fixture(autouse=True)
+def mock_experiment_logger():
+    with patch("control_backend.agents.llm.llm_agent.experiment_logger") as logger:
+        yield logger
+
+
 @pytest.mark.asyncio
 async def test_llm_processing_success(mock_httpx_client, mock_settings):
     # Setup the mock response for the stream