refactor(core): CORE-19 type capture and preserve progress lifetimes

packages/artplayer/src/media/position-revision.ts

@@ -0,0 +1,9 @@
+const revisions = new WeakMap<object, number>()
+
+export function positionRevision(art: object): number {
+  return revisions.get(art) || 0
+}
+
+export function advancePosition(art: object): void {
+  revisions.set(art, positionRevision(art) + 1)
+}