rename() of a directory requires write on the directory itself; mariadb/
redis data roots are owned by the containers' mapped subuids (100998),
so the deploy user cannot move them. Use run_privileged mv (numeric
ownership preserved = rootless mapping contract) and skip the chown pass
for romm via the new keep mode — chowning mapped subuid data to the
deploy uid breaks the in-container mysql/redis users. Collisions with
rescued anonymous-volume stubs now merge one level deep instead of
stranding real data under /opt. Reverse the podman rm order so the
dependent romm container is removed before its backends.