fix(rectification): close round A/2 tail gaps in tests, CI, and stale-score reuse

Window_scan assertions now match the public from_sign/to_sign contract, the
staging quick gate runs the rectification Python suite, and compare-candidates
rescores when stored policy lags the live engine identity.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_rectification_diagnostics_clusters.py

@@ -120,6 +120,8 @@ class RectificationDiagnosticsClustersTest(unittest.TestCase):
             "layer": "d9",
             "at": "05:14",
             "user_meaning": "D9 在 05:14 发生变化",
+            "from_sign": "金牛座",
+            "to_sign": "天蝎座",
         }])
         encoded = str(scan)
         self.assertIn("金牛座", encoded)
@@ -128,6 +130,11 @@ class RectificationDiagnosticsClustersTest(unittest.TestCase):
         self.assertNotIn("Scorpio", encoded)
         self.assertFalse(scan["unique_minute_claim"])
 
+    def test_staging_quick_gate_runs_rectification_python_suite(self) -> None:
+        from pathlib import Path
+        text = Path("scripts/run_quality_gate.py").read_text(encoding="utf-8")
+        self.assertIn('"tests/test_rectification_*.py"', text)
+
 
 if __name__ == "__main__":
     unittest.main()