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>

orders/signals.py

@@ -54,6 +54,11 @@ def handle_order_status_8(sender, instance, **kwargs):
         old = Order.query.filter(pk=instance.pk).values_list('Status', flat=True).first()
         if old != 8 and instance.Status == 8:
             apply_enter_status_8(instance)
+            try:
+                from orders.services.team_recruit import on_order_enter_status_8
+                on_order_enter_status_8(instance)
+            except Exception as e:
+                logger.error(f'组队进结算中锁定失败: {e}')
         elif old == 8 and instance.Status != 8:
             # 成交时长：在清空 SettlementTime 前挂到实例上供 post_save 指标使用
             instance._deal_settle_started_at = instance.SettlementTime
@@ -77,5 +82,10 @@ def handle_order_deal_stats(sender, instance, created, **kwargs):
             ds.on_order_completed(instance, settle_started_at=started)
         elif instance.Status == 5:
             ds.on_order_refunded(instance)
+            try:
+                from orders.services.team_recruit import on_order_refunded
+                on_order_refunded(instance)
+            except Exception as e:
+                logger.error(f'组队退款清退失败: {e}')
     except Exception as e:
         logger.error(f'成交指标信号处理失败: {e}')