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/rsync_stop.sh

@@ -501,7 +501,7 @@ echo ""
 if [[ "$DRY_RUN" == true ]]; then
     warn "DRY RUN — no changes made"
 else
-    log "$ICON_DONE Status: done ✅"
+    echo "$ICON_DONE Status: done ✅"
 fi
 echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"