[batch] only update batch health if changed, or stale 5s (#8003)
[batch] only update batch health if changed, or stale 5s (#8003)


danking/hail,hail-is/hail,cseed/hail,danking/hail,hail-is/hail,cseed/hail,danking/hail,hail-is/hail,hail-is/hail,cseed/hail,hail-is/hail,danking/hail,cseed/hail,hail-is/hail,hail-is/hail,cseed/hail,cseed/hail,danking/hail,danking/hail,cseed/hail,danking/hail,danking/hail,hail-is/hail,cseed/hail