fix: join whatsapp-sys network for internal service communication

Adds whatsapp-sys-net (external) so whatsapp-sys containers can reach
whatsapp-api-oficial via http://whatsapp-api-oficial:3001 without DNS.

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

docker-compose.yml

@@ -10,6 +10,9 @@ services:
       - api_zdg_oficial_data:/usr/src/app/data
     expose:
       - "3001"
+    networks:
+      - default
+      - whatsapp-sys-net
     labels:
       - traefik.enable=true
       - traefik.http.routers.whatsapp-api-oficial.rule=Host(`apimsgoficial.neuralsys.com.br`)
@@ -22,3 +25,9 @@ volumes:
   api_zdg_oficial_data:
     external: true
     name: api_zdg_oficial_data
+
+networks:
+  default: {}
+  whatsapp-sys-net:
+    name: whatsapp-sys_default
+    external: true