Files - Migrate attachments in activities (#17808)

As attachment files have migrated from fullPath to file files field,
need to migrate richText logic to fit to new attachment file handling +
data migration

packages/twenty-front/src/modules/file/graphql/mutations/uploadFilesFieldFile.ts

@@ -7,6 +7,7 @@ export const UPLOAD_FILES_FIELD_FILE = gql`
       path
       size
       createdAt
+      url
     }
   }
 `;