【后端接口】宠物放生：放生返还与亲密度清零

function PetRelease.run(actor, petIdx)
    local pet = actor:GetPet(petIdx)
    if not pet then return false, "宠物不存在" end
    if pet:IsFighting() then return false, "战斗中不可放生" end
    local refund = math.floor(pet.totalInvest * 0.6)
    actor:TakeItemByName("亲密度道具", pet.intimacy)
    giveitem(actor, "宠物经验丹", refund, 1, "放生返还")
    QF_LogRelease(actor:GetUserId(), pet.name, pet.level, refund)
    actor:RemovePet(petIdx)
    sendmsg(actor, 1, pet.name .. " 已放生，返还宠物经验丹 x" .. refund)
    return true
end

function PetRelease.checkLimit(actor)
    local today = os.date("%Y%m%d")
    local count = getplayvar(actor, "HUMAN", "release_" .. today) or 0
    if count >= 3 then return false, "每日放生上限 3 只" end
    setplayvar(actor, "HUMAN", "release_" .. today, count + 1, 1)
    return true
end