Audit logging, soft-delete management, and entity views

Entity audit logging - every create, update, and delete is now tracked, showing what changed, what other entities were affected at the same time, and who made the change. Browse the history on any entity's view page.

Soft-delete management - Active/Deleted tabs on all curator list pages. Curators can restore soft-deleted entities, and admins can permanently delete them (with type-to-confirm safety).

Curator view pages - read-only detail pages for all entity types with full data display, activity logs, and links to public pages and edit forms.

Admin audit log - a dedicated admin page for reviewing role changes, lookup value updates, and other admin-only operations.