refactor(asr): [PKG-ASR-03] own typed audio capture and playback lifetimes

packages/artplayer-plugin-asr/README.md

@@ -3,6 +3,11 @@
 Audio capture and subtitle display plugin for ArtPlayer. Supplies PCM/WAV chunks
 to a caller-provided recognition service.
 
+`stop()` stops recognition and returns a Promise. It permits later playback to
+restart capture; the player's direct Web Audio connection remains alive until
+the player is destroyed so that stopping recognition does not silence playback.
+Call `art.destroy()` when disposing the player.
+
 ## Maintenance
 
 See [ARCHITECTURE.md](ARCHITECTURE.md) for the current audio flow, public behavior,