Analyzer should be moved to ActiveStorage::Analyzer
First there are many bugs with ActiveStorage that needs to be fixed:
Files are not deleted if job is destroyed (dependent: :purge is set)
If a new file is uploaded the old file is not deleted
(has_one_attechment)
Added some attributes like status_changed_at. Refactored migration
files.
Changes to the migration file makes it necessary to reimport the
database: db:drop, db:create, db:migrate, db:seed
