Add exact state observation modes

runs/frontier-fidelity-envelope-v1/test_fidelity_envelope.py

@@ -170,6 +170,14 @@ class FidelityEnvelopeTest(unittest.TestCase):
         self.assertNotIn(
             "--no-metrics_config_store_frontier_stage_batch_ledger", transformed
         )
+        traced = module.transform_command(
+            base, metrics_root=Path("/new/traced-metrics"), run_id="traced", op_trace=True
+        )
+        self.assertIn("--metrics_config_enable_op_level_tracing", traced)
+        self.assertEqual(
+            module.option_value(traced, "--communication_collective_profile_path"),
+            "/profiles/real-allreduce.csv",
+        )
 
     def test_qwen235_state_replay_rejects_implicit_ledger_base(self) -> None:
         module = load("run_qwen235_fixed_pd_state_replay.py")