dnm: cp pr 4030 4460 4950 and add switch for it#5369

haiboumich wants to merge 4 commits into

pingcap:release-8.5pingcap/ticdc:release-8.5from

haiboumich:haiboumich/add-switch-for-scanwindowhaiboumich/ticdc:haiboumich/add-switch-for-scanwindowCopy head branch name to clipboard