feat(i18n): apply ORY bypass whitelist policy and add error-code tests

backend/docs/openapi.yaml

@@ -849,6 +849,11 @@ components:
       properties:
         error:
           type: string
+        code:
+          type: string
+        details:
+          type: object
+          additionalProperties: true
 
     MessageResponse:
       type: object