backups: fix mounting logic of backup settings and cloudron restore

src/scripts/addmount.sh

@@ -30,4 +30,9 @@ systemctl stop "${mount_filename}" || true
 echo "$mount_file_contents" > "${mount_file}"
 
 systemctl daemon-reload
+
+# systemd can automatically create the "where" dir but the backup logic relies on permissions
+mkdir -p "${where}"
+chown yellowtent:yellowtent "${where}"
+
 systemctl enable --no-block --now "${mount_filename}" || true