livekit-agents@1.8.4

## What's Changed
* feat(smallestai): add TTS continuations protocol support by @harshitajain165 in https://github.com/livekit/agents/pull/7111
* baseten: inline mid-conversation instructions for Qwen/Qwen3.8-27B by @henrytang-baseten in https://github.com/livekit/agents/pull/7388
* fix: drain inference STT transcripts before closing by @rosetta-livekit-bot[bot] in https://github.com/livekit/agents/pull/7115
* feat(azure): Add Azure Voice Live Realtime API support by @007DXR in https://github.com/livekit/agents/pull/4693
* Revert "worker: read agent name from livekit.toml as last fallback (#7295)" by @u9g in https://github.com/livekit/agents/pull/7452
* docs: versions change only in release PRs by @u9g in https://github.com/livekit/agents/pull/7457
* fix(workflows): forward Twilio CallToken during warm transfers by @piyush-gambhir in https://github.com/livekit/agents/pull/7309
* feat: record stt event metadata on user turns by @chenghao-mou in https://github.com/livekit/agents/pull/7473
* feat(deepgram): support speed parameter in TTS by @73bruno in https://github.com/livekit/agents/pull/7480
* feat(assemblyai): default to universal-3-6-pro by @dlange-aai in https://github.com/livekit/agents/pull/7518
* fix(aws): omit temperature/top_p for OpenAI GPT-5.6 and GPT-6 on Bedrock by @kimnamu in https://github.com/livekit/agents/pull/7414
* fix(aws): stop logging "unknown chunk type" for Bedrock reasoning deltas by @kimnamu in https://github.com/livekit/agents/pull/7416
* fix(aws): don't retry Bedrock 4xx errors such as ValidationException by @kimnamu in https://github.com/livekit/agents/pull/7418
* feat(elevenlabs): support eleven_v4 and eleven_v4_turbo by @kraenhansen in https://github.com/livekit/agents/pull/7519
* fix(gladia): store region in STT.update_options by @RaphaelFakhri in https://github.com/livekit/agents/pull/7523
* updated smallestai stt adapter by @hamees-sayed in https://github.com/livekit/agents/pull/7379
* fix(llm): block unguarded mutations on read-only chat contexts by @BlueX888 in https://github.com/livekit/agents/pull/7445
* fix(voice): treat a non-list record_keyterms argument as no change by @Lesereingrape in https://github.com/livekit/agents/pull/7468
* fix(stt): honor APIError.retryable in recognize() by @yaosongding in https://github.com/livekit/agents/pull/7474
* fix(llm): make ChatContext.truncate() honor a non-positive max_items by @sxh313 in https://github.com/livekit/agents/pull/7367
* fix(voice): keep text_transforms.replace single-pass across chunks by @sxh313 in https://github.com/livekit/agents/pull/7471
* fix(background_audio): detach agent_state_changed before closing the player by @maktoufzied in https://github.com/livekit/agents/pull/7488
* fix(voice): don't hold TTS text behind a * or _ that can never pair up by @avionicharshit-byte in https://github.com/livekit/agents/pull/7520
* feat: add Microsoft AI speech plugin by @mirimadahmed in https://github.com/livekit/agents/pull/7378
* microsoft_ai: build the TTS voice ID from a voice name and model by @tinalenguyen in https://github.com/livekit/agents/pull/7572
* feat(openai): add the gpt-5.6 models to the model registry by @tinalenguyen in https://github.com/livekit/agents/pull/7549
* (dep): bump livekit to 1.1.20 by @tinalenguyen in https://github.com/livekit/agents/pull/7460
* livekit-agents@1.8.4 by @github-actions[bot] in https://github.com/livekit/agents/pull/7575

## New Contributors
* @henrytang-baseten made their first contribution in https://github.com/livekit/agents/pull/7388
* @007DXR made their first contribution in https://github.com/livekit/agents/pull/4693
* @73bruno made their first contribution in https://github.com/livekit/agents/pull/7480
* @kraenhansen made their first contribution in https://github.com/livekit/agents/pull/7519
* @RaphaelFakhri made their first contribution in https://github.com/livekit/agents/pull/7523
* @BlueX888 made their first contribution in https://github.com/livekit/agents/pull/7445
* @Lesereingrape made their first contribution in https://github.com/livekit/agents/pull/7468
* @yaosongding made their first contribution in https://github.com/livekit/agents/pull/7474
* @maktoufzied made their first contribution in https://github.com/livekit/agents/pull/7488
* @mirimadahmed made their first contribution in https://github.com/livekit/agents/pull/7378

**Full Changelog**: https://github.com/livekit/agents/compare/livekit-agents@1.8.3...livekit-agents@1.8.4