【策划架构】Lua变更集生成：裁决之杖属性的差量下发

local function sync(actor, item)
    sendAll(actor, item)             -- 18字段全量同步
end

local function diff(old, new)
    local patch, n = {}, 0
    for k, v in pairs(new) do
        if old[k] ~= v then
            patch[k] = v            -- 值变才记
            n = n + 1
        end
    end
    return patch, n
end
local patch, n = diff(oldAttr, newAttr)
sendmsg(actor, 1, "裁决之杖变更 " .. n .. " 项已下发")