邮件：定时循环邮件

shared/db/Mail.ts

@@ -21,6 +21,7 @@ export default class Mail extends MailTemp {
         const result: MailType[] = await MailModel.find({ 
             roleId, 
             status: { $in: [ MAIL_STATUS.CREATE, MAIL_STATUS.READ, MAIL_STATUS.RECEIVED ] }, 
+            sendTime: { $lte: nowSeconds()} ,
             endTime: { $gte: nowSeconds() } 
         }).populate('mail').lean();
         return result;