Summary:
Fixes T8727. When I added `setParentQuery()`, I increased the cache hit rate but also accidentally propagated policy exception settings.
Instead, make the policy exception beahvior explicit: no exceptions should be raised when querying handles.
Test Plan: Will test production.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T8727
Differential Revision: https://secure.phabricator.com/D13489
1bb306348c