fix: hardcode sase.tr in Traefik label (env var not interpolated in labels)

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

docker-compose.coolify.yml

@@ -63,7 +63,7 @@ services:
       start_period: 30s
     labels:
       - "traefik.enable=true"
-      - "traefik.http.routers.sase.rule=Host(`${DOMAIN:-sase.tr}`)"
+      - "traefik.http.routers.sase.rule=Host(`sase.tr`)"
       - "traefik.http.routers.sase.entrypoints=https"
       - "traefik.http.routers.sase.tls=true"
       - "traefik.http.routers.sase.tls.certresolver=letsencrypt"