Separate system operations from core objects in GraphQL endpoints (#12977)

Moves system-level operations (auth, billing, admin) to use the
/metadata endpoint instead of /graphql.

This cleans up the endpoint separation so /graphql is purely for core
objects (Company, People, etc.) and /metadata handles all system
operations.

Part of prep work for webhook/API key core migration.

packages/twenty-front/src/modules/activities/files/hooks/useUploadAttachmentFile.tsx

@@ -5,14 +5,19 @@ import { getFileType } from '@/activities/files/utils/getFileType';
 import { ActivityTargetableObject } from '@/activities/types/ActivityTargetableEntity';
 import { getActivityTargetObjectFieldIdName } from '@/activities/utils/getActivityTargetObjectFieldIdName';
 import { currentWorkspaceMemberState } from '@/auth/states/currentWorkspaceMemberState';
+import { useApolloCoreClient } from '@/object-metadata/hooks/useApolloCoreClient';
 import { CoreObjectNameSingular } from '@/object-metadata/types/CoreObjectNameSingular';
 import { useCreateOneRecord } from '@/object-record/hooks/useCreateOneRecord';
-import { FileFolder, useUploadFileMutation } from '~/generated/graphql';
 import { isDefined } from 'twenty-shared/utils';
+import {
+  FileFolder,
+  useUploadFileMutation,
+} from '~/generated-metadata/graphql';
 
 export const useUploadAttachmentFile = () => {
   const currentWorkspaceMember = useRecoilValue(currentWorkspaceMemberState);
-  const [uploadFile] = useUploadFileMutation();
+  const coreClient = useApolloCoreClient();
+  const [uploadFile] = useUploadFileMutation({ client: coreClient });
 
   const { createOneRecord: createOneAttachment } =
     useCreateOneRecord<Attachment>({