fix: disable rate limiting in tests by mocking Limiter

dashboard/backend/tests/conftest.py

@@ -147,11 +147,14 @@ def test_app(mock_config, temp_auth_file, temp_rbac_file, mock_docker_client):
     """Create FastAPI test client with mocked dependencies."""
     # Patch Docker client before importing main
     with patch("docker.DockerClient", return_value=mock_docker_client):
-        from main import app
-        # Disable rate limiting during tests to avoid 429 errors
-        app.state.limiter.enabled = False
-        client = TestClient(app)
-        yield client
+        # Mock the limiter to disable rate limiting during tests
+        mock_limiter = Mock()
+        mock_limiter.limit = lambda *args, **kwargs: lambda func: func
+
+        with patch("slowapi.Limiter", return_value=mock_limiter):
+            from main import app
+            client = TestClient(app)
+            yield client
 
 
 @pytest.fixture