also looking at this

feat(media): add bounded PCM capture, owned snapshots and A/V streaming

#917

Merged chris wants to merge feat/pcm-av-streaming into main

11 files +683 -0

b020d58559 feat(media): add bounded PCM capture and synchronized Matroska streaming Chris review this step
bad4882f92 fix(audio): reject overlapping PCM and bound native read capacity Chris review this step
41b071c047 feat(video): retain bounded PCM history for non-destructive snapshots Chris review this step
860a2ab5a5 feat(video): freeze owned PCM windows for asynchronous consumers Chris review this step