Alert routing follows attribute roles

Renaming a catalogue attribute used to be able to break paging. Routing now targets a role, not a name. In the type editor, mark an attribute as Members, Manager or Notification channel, and alert routing uses whichever attribute carries that role. Existing workspaces are already marked and route exactly as before.

Missing role warning. If a routing rule depends on a role no attribute carries, a banner says so on Settings and on Alert Routing, and the route tester explains what is missing.