Bound and retry complete remote readback checks

lib/space.sh

@@ -21,7 +21,7 @@ ensure_space() {
       [[ -z ${LOCAL_RUN:-} || $(realpath -m "$LOCAL_RUN") != "$dir" ]] || continue
       echo "-- Space recovery: verifying offsite copy before local removal: $name"
       if helper verify "$dir" >/dev/null &&
-         rc check "$dir" "${RCLONE_REMOTE_BASE%/}/$name" --download --exclude /UPLOADED; then
+         remote_readback "$dir" "${RCLONE_REMOTE_BASE%/}/$name" --exclude /UPLOADED; then
         python3 "$LIB_DIR/space.py" remove "$dir"
         echo "-- Space recovery: removed local copy $name; verified offsite copy retained"
       else