LiveKit WebRTC end-to-end validation with real audio #26

Summary

LiveKit token API and worker profile exist. Roadmap still wants e2e with real audio, not just token 503/404 tests.

Context

• tests/integration/test_livekit_token_api.py
• tests/unit/test_livekit.py (skipif)
• src/voxforge/modules/livekit_gateway/
• docker-compose.prod.yml profile livekit

Scope

• Connect a client, publish audio, get a pipeline turn, confirm TTS or transcript
• Document required LiveKit Cloud or self-hosted server
• Prefer nightly/manual over PR CI unless fully mockable

Acceptance criteria

A repeatable script or test that fails loudly when LiveKit is misconfigured, and is skipped when unset.