R1:12dd9ec3ff34

Have EditEngine API methods provide the correct application to Conduit

Summary:
Fixes T9799. Currently, if you can't see an application like Paste, we fatal when trying to generate a result for `conduit.query`, because the new EditEngine-based `paste.edit` method doesn't "know" that it's a "Paste" method.

Straighten this out, and use policies and queries a little more correctly/consistently.

Test Plan:
- Called `conduit.query` as a user who does not have permission to use Paste.
- Before change…