A discrete, replayable edit to a single clip's annotations (comments/markers
and regions). Emitted by ClipCompositionProps.onClipMutation on a
local edit and re-applied by ClipCompositionRef.applyClipMutation on
a remote one — the unit of teacher-authoritative clip sync: a follower proxies
its mutation to the owner, who applies + persists it, fanning the canonical
composition back out.
A discrete, replayable edit to a single clip's annotations (comments/markers and regions). Emitted by ClipCompositionProps.onClipMutation on a local edit and re-applied by ClipCompositionRef.applyClipMutation on a remote one — the unit of teacher-authoritative clip sync: a follower proxies its mutation to the owner, who applies + persists it, fanning the canonical composition back out.