🔧 build(deploy): 端口默认值统一 10003/10004——前端入口固定 10003

约定"容器内部端口无所谓，重要的是宿主机端口；前端 = 10003"。

- .env.example 端口段重写：移除冗余 HOST/PORT（uvicorn 命令硬编码，
  无人读 env）+ 移除误导注释；FRONTEND_PORT/BACKEND_PORT/MOLDINSIGHT_PORT
  默认 10003，INVENTORY_PORT 默认 10004
- docker-compose.yml frontend 默认 80→10003、backend 8000→10003，删除
  backend service 内冗余 HOST/PORT env
- docker-compose.moldinsight.yml / docker-compose.inventory.yml 默认
  端口同步
- DEPLOY_PORT §3 / PORT_CONFIG §1 §2 端口映射示例同步
- STATUS 补录

验证：yaml 渲染端口映射 unified frontend 10003→80、backend 10003→8000，
moldinsight 10003→8000，inventory 10004→8001。

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

docker-compose.inventory.yml

@@ -38,7 +38,7 @@ services:
     container_name: gemold_inventory
     command: ["python", "-m", "uvicorn", "entrypoints.inventory:app", "--host", "0.0.0.0", "--port", "8001"]
     ports:
-      - "${INVENTORY_PORT:-8001}:8001"
+      - "${INVENTORY_PORT:-10004}:8001"
     environment:
       <<: *inventory_env
       HOST: 0.0.0.0