Admin: Add message with failed / total nodes for nodes.json-task.

server/jobs/MailQueueJob.ts

@@ -1,8 +1,12 @@
 import * as MailService from "../services/mailService"
+import {jobResultOkay} from "./scheduler";
 
 export default {
     name: 'MailQueueJob',
     description: 'Send pending emails (up to 5 attempts in case of failures).',
 
-    run: MailService.sendPendingMails,
-}
+    async run() {
+        await MailService.sendPendingMails();
+        return jobResultOkay();
+    },
+};