Anonymize audit logs when soft-deleted users are purged after 15 days:
actor_name set to 'deleted-user', actor_id and resource_id nulled,
email stripped from member metadata. Per-user delete ensures no user
is removed without successful anonymization.
Frontend renders deleted-user as a styled red badge in audit log view.
Fix shared host create/delete audit logs landing in admin's personal
team — now correctly assigned to PlatformTeamID.