Add fidelity-aware verification pilot

tests/test_core_flow.py

@@ -5604,15 +5604,17 @@ class CoreFlowTests(unittest.TestCase):
                 completion_tokens=1,
             ),
         ):
-            outcome = _run_one_request(
-                request,
-                base_url="http://127.0.0.1:8000",
-                timeout_s=1.0,
-            )
+            with mock.patch("aituner.worker.time.monotonic_ns", return_value=123456789):
+                outcome = _run_one_request(
+                    request,
+                    base_url="http://127.0.0.1:8000",
+                    timeout_s=1.0,
+                )
 
         self.assertFalse(outcome.success)
         self.assertEqual(outcome.error, "completion_tokens_mismatch expected=2 actual=1")
         self.assertEqual(outcome.completion_tokens, 1)
+        self.assertEqual(outcome.completed_mono_ns, 123456789)
 
     def test_build_prompt_mentions_completion_tokens_override(self) -> None:
         with tempfile.TemporaryDirectory() as tmp: