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/smart_health.sh

@@ -367,7 +367,7 @@ elif [[ ${#DRIVES_WARN[@]} -gt 0 ]]; then
     notify "SMART WARNING on $(hostname) — drives showing wear: ${DRIVES_WARN[*]}" \
         "SMART Health" "warning"
 else
-    log "$ICON_DONE Status: all ${#DRIVES_OK[@]} drives healthy ✅"
+    echo "$ICON_DONE Status: all ${#DRIVES_OK[@]} drives healthy ✅"
 fi
 echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"