实现支付商户池与微信授权配置

新增收款商户、商户池轮询、微信授权配置独立管理；三类新支付
（C端套餐购买、C端资产钱包充值、代理在线预存款充值）无条件
经商户池选择并冻结路由，无旧综合配置回退。merchant_id 为空
历史支付继续按 payment_config_id 双读。凭证版本化加载与
ID+版本缓存保证轮换一致性。删除商户池新支付创建开关及全部
引用。

internal/service/order/service.go

@@ -11,6 +11,7 @@ import (
 	"time"
 
 	cardObservationApp "github.com/break/junhong_cmp_fiber/internal/application/cardobservation"
+	merchantpayment "github.com/break/junhong_cmp_fiber/internal/application/merchantpayment"
 	walletapp "github.com/break/junhong_cmp_fiber/internal/application/wallet"
 	packagedomain "github.com/break/junhong_cmp_fiber/internal/domain/package"
 	"github.com/break/junhong_cmp_fiber/internal/infrastructure/audit"
@@ -2018,8 +2019,10 @@ func (s *Service) HandlePaymentRecordCallback(ctx context.Context, paymentNo str
 		if thirdPartyTradeNo != "" {
 			paymentUpdates["third_party_trade_no"] = thirdPartyTradeNo
 		}
+		// 迟到首次成功必须允许 pending→paid 与 failed→paid；支付创建时冻结的
+		// merchant_id/routing_epoch 仍决定统计归属，失败状态不表示已计入或已冲销。
 		paymentResult := tx.Model(&model.Payment{}).
-			Where("id = ? AND status = ?", payment.ID, model.PaymentRecordStatusPending).
+			Where("id = ? AND status IN ?", payment.ID, []int{model.PaymentRecordStatusPending, model.PaymentRecordStatusFailed}).
 			Updates(paymentUpdates)
 		if paymentResult.Error != nil {
 			return errors.Wrap(errors.CodeDatabaseError, paymentResult.Error, "更新支付记录失败")
@@ -2035,6 +2038,10 @@ func (s *Service) HandlePaymentRecordCallback(ctx context.Context, paymentNo str
 			return errors.New(errors.CodeInvalidStatus, "支付记录状态不允许处理")
 		}
 
+		if err := merchantpayment.RecordFirstSuccess(ctx, tx, payment, now); err != nil {
+			return err
+		}
+
 		result := tx.Model(&model.Order{}).
 			Where("id = ? AND payment_status = ?", order.ID, model.PaymentStatusPending).
 			Updates(map[string]any{