Fix quality metric persistence ordering

backend/app/services/quality_service.py

@@ -39,6 +39,8 @@ class QualityService:
             completed_at=datetime.now(timezone.utc),
         )
         db.add(quality_check)
+        if hasattr(db, "flush"):
+            db.flush()
 
         for key, value in (metrics or {}).items():
             db.add(

backend/tests/test_sprint7a_persistence_foundation.py

@@ -21,6 +21,7 @@ class FakeSession:
         self.objects = objects or {}
         self.commits = 0
         self.refreshes = []
+        self.flushes = 0
 
     def get(self, model, item_id):
         return self.objects.get((model, item_id))
@@ -31,6 +32,9 @@ class FakeSession:
     def commit(self) -> None:
         self.commits += 1
 
+    def flush(self) -> None:
+        self.flushes += 1
+
     def refresh(self, item) -> None:
         self.refreshes.append(item)
 
@@ -178,6 +182,7 @@ def test_quality_service_persists_quality_check_and_metrics() -> None:
         "false_positive_count",
     ]
     assert persisted_metrics[0].quality_check_id == quality_check.id
+    assert db.flushes == 1
     assert db.commits == 1