Summary:
Ref T4896. Depends on D10052. This is the major/scary migration, but not really so bad. It is substantially similar to D8210, but less complex because there are fewer actions here.
This moves `PhabricatorAuditComment` storage to `PhabricatorAuditTransaction`, then reads `PhabricatorAuditComment`s as a proxy around the new objects.
Test Plan:
- Before migrating, browsed around. Nothing appeared broken.
- Migrated cleanly.
- Viewed old transactions (inlines, comments, accept/reject/etc, add auditors, add ccs, implicit CCs).
- Added all of those comment types.
- Edited a draft.
- Deleted a draft.
- Spot checked the database for sanity.
Reviewers: btrahan, joshuaspence
Reviewed By: joshuaspence
Subscribers: epriestley
Maniphest Tasks: T4896
Differential Revision: https://secure.phabricator.com/D10055