chore: add debug logging for auth token

src/services/n8n.service.ts

@@ -19,6 +19,9 @@ export const sendToN8n = async (data: any): Promise<void> => {
         if (n8nAuthToken) {
             // Send exactly what the user typed in the environment variable
             headers['Authorization'] = n8nAuthToken;
+            console.log(`DEBUG: Sending Authorization header starting with: ${n8nAuthToken.substring(0, 8)}...`);
+        } else {
+            console.log(`DEBUG: No N8N_AUTH_TOKEN found in environment variables. Sending request WITHOUT Authorization header!`);
         }
 
         const response = await axios.post(n8nWebhookUrl, data, { headers });