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/cert_monitor.sh

@@ -277,7 +277,7 @@ elif [[ ${#CRITICAL[@]} -gt 0 || ${#FAILED[@]} -gt 0 ]]; then
 elif [[ ${#WARNING[@]} -gt 0 ]]; then
     warn "Status: WARNINGS — renewal recommended"
 else
-    log "$ICON_DONE Status: all ${#HEALTHY[@]} certs healthy ✅"
+    echo "$ICON_DONE Status: all ${#HEALTHY[@]} certs healthy ✅"
 fi
 echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"