Track online backup source IP and add detailed recovery output

lib/online-backup.js

@@ -1,5 +1,6 @@
 const crypto = require('node:crypto');
 const zlib = require('node:zlib');
+const { isIP } = require('node:net');
 
 const ONLINE_BACKUP_API_URL = 'https://uploader.24-music.de/backup-api';
 const KEY_PREFIX = 'MHU2-';
@@ -238,12 +239,17 @@ async function downloadRecoveryPublicKey(baseUrl = ONLINE_BACKUP_API_URL, option
 }
 
 async function uploadOnlineBackup(record, baseUrl = ONLINE_BACKUP_API_URL, options) {
-  const { response } = await requestText(endpoint(baseUrl, '/v1/backups'), {
+  const { response, body } = await requestText(endpoint(baseUrl, '/v1/backups'), {
     method: 'POST',
     headers: { 'content-type': 'application/json', accept: 'application/json' },
     body: JSON.stringify(record)
   }, options);
   if (response.status !== 201) throw new Error('Online-Sicherung konnte nicht gespeichert werden');
+  try {
+    const metadata = JSON.parse(body);
+    if (typeof metadata.sourceIp === 'string' && isIP(metadata.sourceIp)) return { sourceIp: metadata.sourceIp };
+  } catch {}
+  return {};
 }
 
 async function downloadOnlineBackup(key, baseUrl = ONLINE_BACKUP_API_URL, options) {