R1:3bb7f3624fe9

Implement PhabricatorApplicationTransactionInterface on PhabricatorUser

Summary: Right now, "Publish" workers for user profile edits (title / blub) can get gummed up in the daemons. Implement the interfaces and provide a Query so they can go through.

Test Plan:
- Made a profile "Title" edit.
- Used `bin/worker execute --id <id>` to see task fail.
- Applied patch.
- Saw task work.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Differential Revision: https://secure.phabricator.