Summary

• add a shared structured telemetry channel that emits prefixed JSON trace lines
• instrument microphone, speaker, and TTS playback/query paths with latency, stall, gap, and failure telemetry
• document the telemetry log schema, event vocabulary, and stable error codes

Impact

Release impact: patch.

This does not change the public MOD API, but it adds structured diagnostic output for voice/audio failures and playback quality analysis. The telemetry records are intended for serial/xsbug logs, CI, and future tooling.

Validation

• npm run format
• npm run lint
• npm run test:unit
• npm run check:architecture
• npm run test:moddable