feat: 组队招募（/zudui）+ 结单/自动结算/罚款挂钩

新增 Team 表与接口；进8强制锁、组队分账优先且失败不回退全额队长。

Co-authored-by: Cursor <cursoragent@cursor.com>

a_long_dianjing/urls.py

@@ -14,6 +14,8 @@ urlpatterns = [
 
     # 订单相关路由
     path('dingdan/', include('orders.urls')),
+    # 组队
+    path('zudui/', include('orders.urls_zudui')),
 
     # 商品/陪玩服务相关路由
     path('shangpin/', include('products.urls')),