Add logging for model synchronization and cache handling in syncDatabase.js

Enhance sequelize.js by adding a console log to indicate when models are being synced without constraints. Update syncDatabase.js to include important notes on caching issues with Node.js ES-Modules and log the model loading process during deployment synchronization.

backend/utils/syncDatabase.js

@@ -210,6 +210,10 @@ const syncDatabase = async () => {
 // Deployment-Synchronisation (immer Schema-Updates)
 const syncDatabaseForDeployment = async () => {
     try {
+        // WICHTIG: Bei Caching-Problemen das Script neu starten
+        // Node.js cached ES-Module, daher müssen Models neu geladen werden
+        console.log('📦 Lade Models neu (Node.js Module-Cache wird verwendet)...');
+        
         // Zeige den aktuellen Stage an
         const currentStage = process.env.STAGE || 'nicht gesetzt';
         console.log(`🚀 Starte Datenbank-Synchronisation für Deployment (Stage: ${currentStage})`);