Update mengyastore

mengyastore-backend-go/internal/mq/payload.go

@@ -2,7 +2,7 @@ package mq
 
 import "mengyastore-backend/internal/email"
 
-// OrderEmailPayload is the JSON body published to RabbitMQ (no SMTP secrets).
+// OrderEmailPayload 发布到 RabbitMQ 的订单邮件 JSON 负载（不含 SMTP 口令）。
 type OrderEmailPayload struct {
 	ToEmail     string   `json:"toEmail"`
 	ToName      string   `json:"toName"`