AttachmentValidator: directly embed url schema and pass it fix_media_type
[akkoma] / priv /
drwxr-xr-x   ..
drwxr-xr-x - gettext
drwxr-xr-x - repo
drwxr-xr-x - scrubbers
drwxr-xr-x - static
drwxr-xr-x - templates