chore(dependencies): update package-lock.json and package.json for dependency versions

- Updated lodash from version 4.17.21 to 4.17.23 in package-lock.json for improved performance and security.
- Downgraded sqlite3 from version 5.1.7 to 5.0.2 in both package.json and package-lock.json to maintain compatibility.
- Upgraded @babel/runtime from version 7.28.4 to 7.28.6 in package-lock.json to incorporate the latest features and fixes.
- Added new esbuild dependencies for various architectures (aix, android, darwin, freebsd, linux) to enhance cross-platform support.
- Updated TypeScript definitions for ms and node modules to align with the latest API changes and improve type safety.

backend/services/authService.js

@@ -4,7 +4,7 @@ import User from '../models/User.js';
 import UserToken from '../models/UserToken.js';
 import { sendActivationEmail } from './emailService.js';
 
-import { devLog } from '../utils/logger.js';
+import { devLog, errorLog } from '../utils/logger.js';
 
 const register = async (email, password) => {
   let createdUser = null;
@@ -18,8 +18,16 @@ const register = async (email, password) => {
     // Aufrufer bekommt absichtlich KEINE Userdaten zurück (siehe Controller)
     return;
   } catch (error) {
-    // 1) Immer Grund im Log mit Kontext ausgeben
-    devLog('[authService.register] Fehler bei Registrierung', error);
+    // 1) Immer Grund im Log mit Kontext ausgeben (auch in Prod)
+    errorLog('[authService.register] Fehler bei Registrierung', {
+      name: error?.name,
+      message: error?.message,
+      code: error?.code,
+      responseCode: error?.responseCode,
+      response: error?.response,
+    });
+    // Optional zusätzlich ausführlich im Dev-Log
+    devLog('[authService.register] Stacktrace:', error?.stack);
 
     // 2) Falls User bereits angelegt wurde, wieder löschen (Rollback)
     if (createdUser) {