updates error envelope

Author: pcrespov

packages/models-library/src/models_library/rest_error.py

@@ -1,5 +1,5 @@
 from dataclasses import dataclass
-from typing import Annotated, Any
+from typing import Annotated
 
 from models_library.generics import Envelope
 from pydantic import BaseModel, ConfigDict, Field
@@ -105,7 +105,7 @@ class ErrorGet(BaseModel):
     )
 
 
-class EnvelopedError(Envelope[Any]):
+class EnvelopedError(Envelope[None]):
     error: ErrorGet  # type: ignore
 
     model_config = ConfigDict(

services/web/server/src/simcore_service_webserver/api/v0/openapi.yaml

@@ -9247,9 +9247,7 @@ components:
     EnvelopedError:
       properties:
         data:
-          anyOf:
-          - {}
-          - type: 'null'
+          type: 'null'
           title: Data
         error:
           $ref: '#/components/schemas/ErrorGet'