Add rake task to prepare database for foreign keys introduced by #3562 (#3614)
Add rake task to prepare database for foreign keys introduced by #3562 (#3614)

* Add rake task to prepare database for foreign keys introduced by #3562

* Fix typo

* Do not delete OAuth values where NULL values may be permitted

* Fix typo

kibousoft/mastodon,kibousoft/mastodon,kibousoft/mastodon,kibousoft/mastodon