pid unmarshal from persist info should be float64 type
pid unmarshal from persist info should be float64 type

Signed-off-by: Crazykev <30005fb020d50e8efc10620c1442bb709ef16c32@zju.edu.cn>

jinfenw/runv,gao-feng/runv,jinfenw/runv,gnawux/runv,gao-feng/runv,gnawux/runv,hyperhq/runv,jinfenw/runv,hyperhq/runv,laijs/runv,gnawux/runv,laijs/runv,wrouesnel/runv,YaoZengzeng/runv,bergwolf/runv,hyperhq/runv,gao-feng/runv,feiskyer/runv,YaoZengzeng/runv,wrouesnel/runv,bergwolf/runv,feiskyer/runv,bergwolf/runv,laijs/runv