test(tradein): align yandex history tests с batch-executemany (unblock deploy) (#851)

Co-authored-by: bot-backend <bot-backend@gendsgn.local>
Co-committed-by: bot-backend <bot-backend@gendsgn.local>

tradein-mvp/backend/tests/test_estimator_yandex_integration.py

@@ -158,8 +158,11 @@ def test_save_history_items_inserts_each():
     ):
         saved = _save_yandex_history_items(db, result)
     assert saved == 2
-    # 2 INSERTs (one per item) + 1 commit
-    assert db.execute.call_count == 2
+    # 1 batch INSERT (executemany) + 1 commit
+    assert db.execute.call_count == 1
+    args = db.execute.call_args
+    rows = args.args[1]
+    assert isinstance(rows, list) and len(rows) == 2
     db.commit.assert_called_once()
 
 
@@ -194,10 +197,21 @@ def test_save_history_items_ext_id_stable_across_calls():
     ):
         _save_yandex_history_items(db1, result)
         _save_yandex_history_items(db2, result)
-    # Both got same call params (ext_id derived from same seed)
-    ext_ids_1 = [c.args[1]["ext_id"] for c in db1.execute.call_args_list]
-    ext_ids_2 = [c.args[1]["ext_id"] for c in db2.execute.call_args_list]
+    # Both calls pass a list-of-dicts (batch executemany); ext_id extracted from each row
+    ext_ids_1 = [
+        r["ext_id"]
+        for c in db1.execute.call_args_list
+        if isinstance(c.args[1], list)
+        for r in c.args[1]
+    ]
+    ext_ids_2 = [
+        r["ext_id"]
+        for c in db2.execute.call_args_list
+        if isinstance(c.args[1], list)
+        for r in c.args[1]
+    ]
     assert ext_ids_1 == ext_ids_2
+    assert len(ext_ids_1) == 2
 
 
 def test_save_history_items_db_error_rolls_back_batch():