Convert the backup/restore data-plane sudo calls (mkdir/chown/rm/sqlite3/tar/
gzip|tee) to runFileOp/runFileWrite. Rooted behaviour is identical (helper runs
sudo); rootless will run them as the unprivileged install user. Pilot subsystem
for the wider de-sudo. verify.sh's /tmp scratch ops left as-is (different
ownership domain, handled separately).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
d5acb7e169