Summary:
Ref T5791. This does a few bits there. Namely:
- Adds PHID column to PhabricatorMetaMTAMail
- Implements a PhabricatorMetaMTAMailPHIDType
- Script to backpopulate them.
- Makes PhabricatorMetaMTAMail implement PolicyInterface.
- View policy is NOONE and the author and recipients have automatic view capabilities
- No edit capability.
- Adds a PhabricatorMetaMTAMailQuery for PhabricatorMetaMTAMail.
Test Plan: ran `./bin/storage upgrade` successfully. commented on a maniphest task and verifed the metamta mail object in the database was created successfully with a shiny new phid
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: epriestley, Korvin
Maniphest Tasks: T5791
Differential Revision: https://secure.phabricator.com/D13394
