Update generated code for v1278

OPENAPI_VERSION

@@ -1 +1 @@
-v1277
+v1278

stripe/forwarding/_request.py

@@ -5,7 +5,7 @@
 from stripe._listable_api_resource import ListableAPIResource
 from stripe._request_options import RequestOptions
 from stripe._stripe_object import StripeObject
-from typing import ClassVar, List, Optional, cast
+from typing import ClassVar, Dict, List, Optional, cast
 from typing_extensions import Literal, NotRequired, TypedDict, Unpack
 
 
@@ -197,6 +197,10 @@ class RetrieveParams(RequestOptions):
     """
     Has the value `true` if the object exists in live mode or the value `false` if the object exists in test mode.
     """
+    metadata: Optional[Dict[str, str]]
+    """
+    Set of [key-value pairs](https://stripe.com/docs/api/metadata) that you can attach to an object. This can be useful for storing additional information about the object in a structured format.
+    """
     object: Literal["forwarding.request"]
     """
     String representing the object's type. Objects of the same type share the same value.