[Observability] Add startup, memory, and hybrid SWA diagnostics (#33375)

test/registered/unit/model_executor/test_prefill_cuda_graph_runner.py

@@ -77,12 +77,12 @@ class TestPrefillCudaGraphRunnerChunkedPrefix(CustomTestCase):
             "check_cuda_graph_backend",
             return_value=False,
         ):
-            runner = capture_prefill_graph(
+            capture = capture_prefill_graph(
                 model_runner=model_runner,
                 eager_runner=eager_runner,
             )
 
-        self.assertIs(runner, eager_runner)
+        self.assertIs(capture.runner, eager_runner)
 
     def test_prefix_chunk_capacity_is_aggregate_and_can_be_overridden(self):
         model_runner = SimpleNamespace(