【工具链】版本比对：两次发布间的变更清单

---脚本差异：函数与触发器粒度
function Diff.scan(oldDir, newDir)
    local report = { added = {}, removed = {}, changed = {} }
    for _, f in ipairs(Diff.luaFiles(newDir)) do
        local old = Diff.funcIndex(oldDir .. "/" .. f)
        local new = Diff.funcIndex(newDir .. "/" .. f)
        for name in pairs(new) do
            if not old[name] then
                report.added[#report.added + 1] = f .. ":" .. name
            elseif old[name] ~= new[name] then
                report.changed[#report.changed + 1] = f .. ":" .. name
            end
        end
        for name in pairs(old) do
            if not new[name] then
                report.removed[#report.removed + 1] = f .. ":" .. name
            end
        end
    end
    return report
end

---配置差异：逐键比对新旧配表
function Diff.configDiff(oldCfg, newCfg)
    local out = {}
    for k, v in pairs(newCfg) do
        if oldCfg[k] ~= v then
            out[#out + 1] = { key = k, old = oldCfg[k], new = v }
        end
    end
    return out
end

---发布报告的组装
function Diff.report(verA, verB)
    local r = Diff.scan("release_" .. verA, "release_" .. verB)
    local c = Diff.configDiff(Diff.loadCfg(verA), Diff.loadCfg(verB))
    return {
        funcs = r, cfgKeys = #c,
        risks = Diff.markRisks(r),
    }
end