R1:2a5c987c714d

Lock policy queries to their applications

Summary:
While we mostly have reasonable effective object accessibility when you lock a user out of an application, it's primarily enforced at the controller level. Users can still, e.g., load the handles of objects they can't actually see. Instead, lock the queries to the applications so that you can, e.g., never load a revision if you don't have access to Differential.

This has several parts:

- For PolicyAware queries, provide an application class name…