Allow objects to be put in an "MFA required for all interactions" mode, and support "MFA required" statuses in Maniphest
Put tasks in this mode if they're in a status that specifies it is an mfa status.
This is still a little rough for now:
- There's no UI hint that you'll have to MFA. I'll likely add some hinting in a followup.
- All edits currently require MFA, even subscribe/unsubscribe. We could maybe relax this if it's an issue.
- Edited an MFA-required object via comments, edit forms, and most/all of the extensions. These prompted for MFA, then worked correctly.
- Tried to edit via Conduit, failed with a reasonably comprehensible error.
Reviewed By: amckinley
Maniphest Tasks: T13222
Differential Revision: https://secure.phabricator.com/D19899