Fastly updater doesn't purge deleted media
When media is deleted from the disk, the fastly cache isn't updated. Allowing media to continue to be served from that url even if it's replaced by a file of the same name.
The current fastly clearing function deals with static files, but this should be expanded to include media file deletions (if possible)
This might mean keeping a log of all media files so they can be compared and acted upon.