feat(devices): hourly scan-cycle orchestration + cron

lib/cron/index.js

@@ -5,6 +5,7 @@ import { enqueue } from '../jobs/queue.js';
 import { checkAll } from '../health/checker.js';
 import * as statusRepo from '../db/repos/service_status.js';
 import * as services from '../db/repos/monitored_services.js';
+import { runDeviceScanCycle } from '../infra/scan_cycle.js';
 
 export function startCron() {
   // Daily at 03:00 local time
@@ -35,5 +36,11 @@ export function startCron() {
     } catch (e) { log.error({ err: e }, 'health check failed'); }
   });
 
+  // Hourly LAN device scan (staggered off the :00 speedtest)
+  cron.schedule('7 * * * *', async () => {
+    try { await runDeviceScanCycle(); }
+    catch (e) { log.error({ err: e }, 'device scan cycle failed'); }
+  });
+
   log.info('cron started');
 }