ADR-0087 exemption (no-migration-prescription): No metadata moves: no spec key, authorable spelling or exported declaration is added, removed, renamed or re-shaped, so there is nothing for `objectstack migrate meta` to rewrite. What changes is a platform object this package ships and owns, `sys_notification_preference`: its `user_id` column becomes a `sys_user` lookup, and what narrows is the write accept set of that object's rows, which are admin-authored data rather than metadata. No ADR-0087 conversion reaches a stored data row; the stored rows that spelled the retired `'*'` are rewritten by this package itself at boot, and the one-default-per-key index is a runtime migration in `@objectstack/metadata-protocol`. The other categories are closed on facts: both packages publish (not unpublished); no ADR-0087 id is named or touched (not registered or already-registered); and nothing exported is removed or narrowed (not runtime-interface-only, type-surface-only or runtime-export-retired).