fix: support RequestErrorResponse a little more dynamically

horde_sdk/generic_api/apimodels.py

@@ -232,6 +232,8 @@ class RequestErrorResponse(HordeResponseBaseModel, ContainsMessageResponseMixin)
     object_data: object = None
     """This is a catch all for any additional data that may be returned by the API relevant to the error."""
 
+    rc: str = "RC_MISSING"
+
     @override
     @classmethod
     def get_api_model_name(cls) -> str | None:

horde_sdk/generic_api/generic_clients.py

@@ -244,15 +244,21 @@ def _after_request_handling(
         # If requests response is a failure code, see if a `message` key exists in the response.
         # If so, return a RequestErrorResponse
         if returned_status_code >= 400:
-            if len(raw_response_json) == 1 and "message" in raw_response_json:
-                return RequestErrorResponse(**raw_response_json)
-
             if "errors" in raw_response_json:
                 raise AIHordePayloadValidationError(
                     raw_response_json.get("errors", ""),
                     raw_response_json.get("message", ""),
                 )
 
+            try:
+                return RequestErrorResponse(**raw_response_json)
+            except ValidationError:
+                return RequestErrorResponse(
+                    message="The API returned an error we didn't recognize! See `object_data` for the raw response.",
+                    rc=raw_response_json.get("rc", returned_status_code),
+                    object_data={"raw_response": raw_response_json},
+                )
+
         handled_response: HordeResponseTypeVar | RequestErrorResponse | None = None
         try:
             parsed_response = expected_response_type.model_validate(raw_response_json)