Module manifest 

Recording session manifest.

Lands in M-MEDIA.20 (AUT-116). This file is the scaffolded module so the crate compiles before that chunk.

Planned surface:

RecordingManifest {
  session_id:      Uuid,
  created_at:      DateTime<Utc>,
  video_tracks:    Vec<VideoTrack>,
  audio_tracks:    Vec<AudioTrack>,
  cursor_track:    Option<CursorTrack>,
  timeline_origin: MediaTime,
  duration:        MediaDuration,
}

Serializable (serde JSON + a stable on-disk format). Describes the session — does not render it. The app reopens a recording by loading a manifest + lazily resolving track files relative to the manifest’s parent directory.