Verbessere Codequalität und Sicherheit durch Refactoring, Hinzufügen von ESLint-Regeln und Aktualisierung der OSV-Scanner-Konfiguration

server/api/newsletter/groups/[id]/posts/list.get.js

@@ -1,6 +1,7 @@
 import fs from 'fs/promises'
 import path from 'path'
 import { getUserFromToken, hasAnyRole } from '../../../../../utils/auth.js'
+import { decryptObject } from '../../../../../utils/encryption.js'
 
 // nosemgrep: javascript.lang.security.audit.path-traversal.path-join-resolve-traversal.path-join-resolve-traversal
 // filename is always a hardcoded constant (e.g., 'newsletter-posts.json'), never user input