I'm attempting to migrate to ActiveStorage in solidus, I have a new instance of my rails application that I've been patching and migrated over my database. I was thinking the simplest way to fix the product attachments would be to migrate the images as described here: https://github.com/thoughtbot/paperclip/blob/master/MIGRATING.md#moving-files-on-a-remote-host-s3-azure-storage-gcs-etc but this seems a bit out dated and I haven't been able to use the method "attach" on spree variants or products because it says the method is undefined. Any tips?