Monitors echo/log audit pass

Status conclusions and clean-check summaries → echo: backup_verify (pre-flight
passed, all files match), bandwidth_monitor (logged transfer entry),
cert_monitor/smart_health (all healthy), system_tuning_monitor (snapshot written),
weekly_health_digest (smart no-findings exit, digest sent), zfs_memory_snapshot
(all pools ONLINE, all checks within thresholds). Manual-Monitors.md: added
Output Tiers section.

Monitors/system_tuning_monitor.sh

@@ -245,4 +245,4 @@ fi
 echo "${DATE}|${TIME}|${INOTIFY_USED}|${INOTIFY_LIMIT}|${INOTIFY_PCT}|${INOTIFY_WARN}|${PHPFPM_ACTIVE}|${PHPFPM_MAX}|${PHPFPM_PCT}|${PHPFPM_WARN}" \
     >> "$TUNING_MONITOR_LOG"
 
-log "Snapshot written: inotify ${INOTIFY_PCT}% php-fpm ${PHPFPM_PCT}%"
+echo "Snapshot written: inotify ${INOTIFY_PCT}% php-fpm ${PHPFPM_PCT}%"