System-managed fields cannot be renamed — createdAt/createdBy/updatedAt/updatedBy stay in English on every record page

Bug description Standard fields can be localised by writing standardOverrides.label via updateOneField — that works and the frontend honours it (thanks!). But the server rejects the same mutation for system-managed fields: FIELD_MUTATION_NOT_ALLOWED: Cannot edit system-managed field "createdAt" properties: label Four of those fields are shown on every record page: createdBy, createdAt, updatedBy, updatedAt. They render as "Created by", "Creation date", "Updated by", "Last update" next to fully localised ones, so a Czech workspace ends up with a form that is half translated. The same applies to the system reverse relations attachments, taskTargets, noteTargets, timelineActivities (less visible — hidden-field list and relation pickers). Twenty's own i18n does not cover these labels either: the workspace member locale is cs-CZ and they still render in English, so there is no path to a fully localised record page today. S…