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/clear_logs.sh

@@ -277,12 +277,12 @@ if [[ "$TOTAL_CLEARED" -gt 0 || ${#FAILED[@]} -gt 0 ]]; then
         notify "Log clear failed on $(hostname) ($MY_ID) — ${FAILED[*]}" \
             "Clear Logs" "warning"
     else
-        log "$ICON_DONE Status: done — ${TOTAL_FREED_H} freed"
+        echo "$ICON_DONE Status: done — ${TOTAL_FREED_H} freed"
     fi
     echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
 else
     # All logs under threshold — completely silent
-    log "All logs under threshold — nothing to clear"
+    echo "All logs under threshold — nothing to clear"
 fi
 
 [[ ${#FAILED[@]} -gt 0 ]] && exit 1