fix: add Traefik port label for backend service

Traefik defaults to port 80 when no loadbalancer port is specified.
Backend listens on 8001, causing the trendyol-api domain to timeout.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -37,6 +37,9 @@ services:
     ports:
       - "8010:8001"
 
+    labels:
+      - "traefik.http.services.backend.loadbalancer.server.port=8001"
+
     environment:
       # Python environment
       PYTHONUNBUFFERED: 1