Add QSC prompt and phase timings

tests/test_cli.py

@@ -1269,6 +1269,20 @@ class CliTests(unittest.TestCase):
             self.assertEqual(folder_summary["processed_video_count"], 1)
             self.assertEqual(folder_summary["failed_video_count"], 0)
             self.assertEqual(folder_summary["event_counts"], {"queue_detected": 1})
+            phase_timings = json.loads(
+                (output_dir / "phase_timings.json").read_text(encoding="utf-8")
+            )
+            self.assertEqual(phase_timings["schema_version"], "phase-timings-v1")
+            for phase in (
+                "source_acquisition_seconds",
+                "video_probe_seconds",
+                "frame_sampling_seconds",
+                "clip_generation_seconds",
+                "inference_seconds",
+                "aggregation_seconds",
+            ):
+                self.assertIn(phase, phase_timings["phases"])
+                self.assertGreaterEqual(phase_timings["phases"][phase], 0)
 
 
 if __name__ == "__main__":