Two-gate design: server must have ≥30 days uptime AND last run must
be ≥30 days ago. Both gates must pass before any scripts fire. Called
daily at 3am via cron — script self-gates, calling more often is safe.
State file on /boot/config (survives reboots): the interval gate is
independent of uptime. A reboot resets uptime but does not reset when
maintenance last ran — both gates must independently pass.
MONTHLY_MAINTENANCE_SCRIPTS added to master.conf in ORCHESTRATORS
section. zfs_pool_scrub.sh and smart_long_test.sh listed but commented
(neither script exists yet). Also commits mesh_monitor.sh move to
Monitors/ that was staged from prior session.
Supports --force to bypass both gates for manual runs.
Gmer4Lfe