Summary: Fixes T4666, add Herald rules to Phriction Documents
Test Plan: add Herald rule to flag if title contains "xyz", create Phriction Document with title "xyz". Phriction Document should be flagged.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin, epriestley
Maniphest Tasks: T4666
Differential Revision: https://secure.phabricator.com/D10830
