Add ServiceBase and ServiceTeams modules
Add BucketUpdater service
Switch controller to use BucketUpdater
Remove :update from :authorize_write_team!
Refactor BucketsController#create
Rearrange methods
Refactor BucketUpdater
Add BucketDestroyer service
Update BucketsController to use BucketDestroyer
Update BucketDestroyer#process documentation
Add PrioritizedIssueArchiver service
Update controllers to use PrioritizedIssueArchiver