Add new tests

Author: vhaldemar

src/yandex_cloud_ml_sdk/_types/batch/operation.py

@@ -42,6 +42,10 @@ def __init__(
         self._sdk = sdk
         self._lock = Lock()
 
+    @property
+    def id(self) -> str:
+        return self._id
+
     @property
     def _client(self) -> AsyncCloudClient:
         return self._sdk._client