🐞 fix(邮件): 全服邮件慢查询问题

shared/db/ServerMail.ts

@@ -13,6 +13,7 @@ class RoleStatus {
     status: number;
 }
 
+@index({ serverId: 1 })
 @index({ sendTime: 1 })
 export default class ServerMail extends MailTemp {
     @prop({ required: true })
@@ -95,9 +96,10 @@ export default class ServerMail extends MailTemp {
      * @param _id 
      * @param roleId 
      */
-    public static async delMailsByRoleId(roleId: string) {
+    public static async delMailsByRoleId(roleId: string, serverId: number) {
         const ids: { _id: string }[] = await ServerMailModel.find(
             { 
+                serverId,
                 isSp: false, 
                 sendTime:{ $lte: nowSeconds() },
                 $or: [{