fix parsing db and tests

tests/test_db.py

@@ -58,8 +58,8 @@ class TestPersistenceServiceIntegration(unittest.TestCase):
 
         same = self._record("777", price=1000, content_hash="same")
         updated_same = self.persistence.upsert_car(same)
-        self.assertEqual(updated_same["action"], "updated")
-        self.assertEqual(updated_same["images_upserted"], 1)
+        self.assertEqual(updated_same["action"], "skipped")
+        self.assertEqual(updated_same["images_upserted"], 0)
 
         changed = self._record("777", price=1500, content_hash="changed")
         updated = self.persistence.upsert_car(changed)
@@ -74,6 +74,36 @@ class TestPersistenceServiceIntegration(unittest.TestCase):
         self.assertEqual(cars[0].price, 1500)
         self.assertEqual(len(images), 1)
 
+    def test_update_replaces_old_images(self) -> None:
+        first = self._record("888", content_hash="v1")
+        self.persistence.upsert_car(first)
+
+        second = self._record("888", content_hash="v2")
+        second.images = [
+            ImageRecord(
+                fullres_image="https://vis.iaai.com/resizer?imageKeys=2&width=845&height=633",
+                preview_image="https://vis.iaai.com/resizer?imageKeys=2&width=400&height=300",
+                order_index=0,
+            )
+        ]
+        self.persistence.upsert_car(second)
+
+        with self.persistence.session_scope() as session:
+            images = session.execute(select(Image)).scalars().all()
+
+        self.assertEqual(len(images), 1)
+        self.assertIn("imageKeys=2", images[0].fullres_image)
+
+    def test_same_content_hash_is_skipped(self) -> None:
+        first = self._record("999", content_hash="same-hash")
+        self.persistence.upsert_car(first)
+
+        second = self._record("999", content_hash="same-hash")
+        result = self.persistence.upsert_car(second)
+
+        self.assertEqual(result["action"], "skipped")
+        self.assertEqual(result["images_upserted"], 0)
+
 
 if __name__ == "__main__":
     unittest.main()