On installs migrated from EasyDocker the spool file
/var/spool/cron/crontabs/<user> can be left owned by a defunct UID. The
sticky bit on the spool directory then blocks the current install user from
replacing it, so every `crontab -` write failed with
"rename: Operation not permitted" while the scripts still printed success.
crontabClear now removes the crontab as root (`crontab -u <user> -r`), which
bypasses the sticky bit and clears the stale file; the setup steps recreate
it owned by the install user, so the next crontab refresh self-heals.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
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