Rebuild cron on boot via disks_mounted event

/etc/cron.d/varaverk is RAM-based and wiped on every reboot. The
disks_mounted event fires early in boot (before Docker) with /boot
already readable, so schedule.json is available to restore the cron
file automatically without any user action.

Plugin/usr/local/emhttp/plugins/varaverk/event/disks_mounted/rebuild_cron

@@ -0,0 +1,8 @@
+#!/bin/bash
+# Rebuild /etc/cron.d/varaverk from schedule.json after every boot.
+# /etc/cron.d/ is RAM-based and wiped on reboot; schedule.json persists on flash.
+php -r "
+require_once '/usr/local/emhttp/plugins/varaverk/include/scheduler.php';
+\$schedule = vv_schedule_load();
+if (\$schedule) vv_cron_rebuild(\$schedule);
+" 2>/dev/null