fix bug (Comfy-Org#7894)

Author: christian-byrne

comfy_api_nodes/apis/client.py

@@ -297,6 +297,10 @@ def execute(self, client: Optional[ApiClient] = None) -> R:
 
             # Convert request model to dict, but use None for EmptyRequest
             request_dict = None if isinstance(self.request, EmptyRequest) else self.request.model_dump(exclude_none=True)
+            if request_dict:
+                for key, value in request_dict.items():
+                    if isinstance(value, Enum):
+                        request_dict[key] = value.value
 
             # Debug log for request
             logging.debug(f"[DEBUG] API Request: {self.endpoint.method.value} {self.endpoint.path}")