feat(topup): add admin-only audit info to top-up logs

Thread caller IP from webhook/admin controllers through model recharge
functions and record a new RecordTopupLog entry with admin_info (server
IP, caller IP, order payment method, callback payment method, system
version). Frontend shows these fields in the expanded log row and the
IP column for admins on top-up logs, while non-admins continue to see
admin_info stripped by formatUserLogs.

controller/topup_creem.go

@@ -353,7 +353,7 @@ func handleCheckoutCompleted(c *gin.Context, event *CreemWebhookEvent) {
 		log.Printf("警告：Creem回调中客户姓名为空 - 订单号: %s", referenceId)
 	}
 
-	err := model.RechargeCreem(referenceId, customerEmail, customerName)
+	err := model.RechargeCreem(referenceId, customerEmail, customerName, c.ClientIP())
 	if err != nil {
 		log.Printf("Creem充值处理失败: %s, 订单号: %s", err.Error(), referenceId)
 		c.AbortWithStatus(http.StatusInternalServerError)