fix: 统一付呗/微信直连官方查单确认，轮询幂等入账

复查与充值轮询按通道查官方单：付呗单查付呗、直连查微信；履约仍幂等防多加，未完成返回业务码便于继续轮询。

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

products/views/huiyuan_payment.py

@@ -645,13 +645,13 @@ class HuiyuanLunxun(APIView):
                     return Response({
                         'code': 400,
                         'message': str(exc),
-                    }, status=status.HTTP_400_BAD_REQUEST)
+                    }, status=status.HTTP_200_OK)
 
             if order.zhuangtai != 3:
                 return Response({
                     'code': 400,
                     'message': '会员订单尚未支付完成'
-                }, status=status.HTTP_400_BAD_REQUEST)
+                }, status=status.HTTP_200_OK)
 
             from jituan.services.member_recharge import repair_member_entitlement_if_paid
             repair_member_entitlement_if_paid(dingdanid)