【运维发布】停服维护窗口：公告与补偿的自动化

---维护的定时编排：提前公告与自动停服
setontimerex(86, 60)
function Maintain.tick()
    local hm = os.date("%H%M")
    -- 开服前 24 小时与 1 小时各公告一次
    if hm == Maintain.announceAt1 then
        sendmsg(nil, 1, "服务器将于明日 02:00-04:00 停服维护，补偿 500 元宝")
    elseif hm == Maintain.announceAt2 then
        sendmsg(nil, 1, "服务器 1 小时后停服维护，请及时下线")
    elseif hm == Maintain.shutdownAt then
        Maintain.beginShutdown()
    end
end

---停服的收尾：踢线、落盘、关服
function Maintain.beginShutdown()
    Ledger.flush()
    MailQueue.persist()
    Gateway.kickAll("服务器维护中，12:00 见")
    os.execute("shutdown_cmd")
end

---开服前的自检：全绿才放行
function Maintain.preOpen()
    local checks = {
        { name = "配置装载", fn = Cfg.loadAll },
        { name = "数据库连通", fn = DB.ping },
        { name = "冒烟用例", fn = Smoke.run },
        { name = "补偿发放", fn = Compensate.send },
    }
    for _, c in ipairs(checks) do
        local ok = c.fn()
        if not ok then
            Ops.alert("开服自检失败：" .. c.name)
            return false
        end
    end
    Gateway.openListen()
    sendmsg(nil, 1, "维护完成，服务器已开放！")
    return true
end