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/domain/agentrecharge/payment_confirmation.go

@@ -24,25 +24,28 @@ const (
 
 // PaymentConfirmationFacts 是支付确认所需的渠道与本地权威事实。
 type PaymentConfirmationFacts struct {
-	OrderType                 string
-	ExpectedOrderType         string
-	PaymentMethod             string
-	RechargePaymentMethod     string
-	RechargePaymentChannel    string
-	PaymentConfigID           uint
-	RechargePaymentConfigID   uint
-	ConfirmedConfigID         uint
-	MerchantIdentity          string
-	ConfirmedMerchantIdentity string
-	PaymentAmount             int64
-	RechargeAmount            int64
-	ConfirmedAmount           int64
-	PaymentOrderID            uint
-	RechargeID                uint
-	PaymentState              PaymentState
-	RechargeStatus            int
-	StoredTradeNo             string
-	ConfirmedTradeNo          string
+	OrderType                   string
+	ExpectedOrderType           string
+	PaymentMethod               string
+	RechargePaymentMethod       string
+	RechargePaymentChannel      string
+	PaymentConfigID             uint
+	RechargePaymentConfigID     uint
+	ConfirmedConfigID           uint
+	FrozenMerchant              bool
+	FrozenMerchantPaymentMethod string
+	FrozenMerchantProviderType  string
+	MerchantIdentity            string
+	ConfirmedMerchantIdentity   string
+	PaymentAmount               int64
+	RechargeAmount              int64
+	ConfirmedAmount             int64
+	PaymentOrderID              uint
+	RechargeID                  uint
+	PaymentState                PaymentState
+	RechargeStatus              int
+	StoredTradeNo               string
+	ConfirmedTradeNo            string
 }
 
 // ValidatePaymentConfirmation 校验支付确认不变量，并返回是否属于完全一致的重复确认。
@@ -60,7 +63,20 @@ func ValidatePaymentConfirmation(facts PaymentConfirmationFacts) (bool, error) {
 		return false, errors.New(errors.CodeConflict, "支付渠道与代理充值单不一致")
 	}
 	identity := strings.TrimSpace(facts.MerchantIdentity)
-	if facts.PaymentConfigID == 0 || facts.PaymentConfigID != facts.RechargePaymentConfigID ||
+	if facts.FrozenMerchant {
+		frozenMethod := strings.TrimSpace(facts.FrozenMerchantPaymentMethod)
+		providerType := strings.TrimSpace(facts.FrozenMerchantProviderType)
+		if identity == "" || frozenMethod != method || providerType == "" {
+			return false, errors.New(errors.CodeConflict, "冻结商户支付事实不一致")
+		}
+		expectedChannel := method
+		if method == constants.RechargeMethodWechat && providerType == model.ProviderTypeFuiou {
+			expectedChannel = model.ProviderTypeFuiou
+		}
+		if channel != expectedChannel {
+			return false, errors.New(errors.CodeConflict, "支付渠道与冻结商户不一致")
+		}
+	} else if facts.PaymentConfigID == 0 || facts.PaymentConfigID != facts.RechargePaymentConfigID ||
 		facts.PaymentConfigID != facts.ConfirmedConfigID || identity == "" ||
 		identity != strings.TrimSpace(facts.ConfirmedMerchantIdentity) {
 		return false, errors.New(errors.CodeConflict, "支付配置身份与创建记录不一致")