When the feed query on project profile pages overheats, contain the damage

Summary:
Ref T13349. This is almost the same change as D20678, but for project profiles instead of user profiles.

The general reproduction case is "view a project where you can't see more than 50 of the 500 most recent feed stories".

Test Plan:

• Forced all queries to overheat.
• Viewed a project profile page.
• Before: overheating fatal near top level.
• After: damage contained to feed panel.

Maniphest Tasks: T13349

Differential Revision: https://secure.phabricator.com/D20704