fix: resolve port conflict between api and worker

apps/whatsapp-worker/src/index.ts

@@ -185,7 +185,7 @@ const worker = new Worker('whatsapp-queue', async (job: Job<JobData>) => {
 });
 
 // ─── STARTUP ─────────────────────────────────────────────────────────────────
-const PORT = parseInt(process.env.PORT || '7860');
+const PORT = 8081; // Internal port for the bridge, avoids conflict with the main API on Railway's public PORT
 
 const start = async () => {
     try {