unRAID_Essentials echo/log audit pass + exit traps

Exit traps: resource_watchdog registers/clears trap for stopped containers;
server_reboot registers trap to restart Docker service on abort; system_watchdog
records containers before bulk stop and registers trap to restart if reboot aborts.

echo/log audit: status conclusions, nothing-to-do, and clean-cycle confirmations
→ echo across clear_logs, docker_syslog_filter, mover_stop, php_fpm_max_children,
rsync_stop, user_scripts_stop. resource_watchdog: disabled flag, restore-level
messages, pressure status → echo. system_watchdog: clean-cycle summary → echo.
Manual-Unraid_Essentials.md: added Output Tiers section.

unRAID_Essentials/php_fpm_max_children.sh

@@ -238,7 +238,7 @@ echo "$ICON_GEAR   Config file:  $PHP_CONF"
 echo "$ICON_PHP    Applied:      pm.max_children = $PHP_MAX_CHILDREN"
 echo "$ICON_TIME   Duration:     $(format_duration $(( END - START )))"
 echo ""
-log "$ICON_DONE Status: done ✅"
+echo "$ICON_DONE Status: done ✅"
 echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
 
 exit 0