livekit-agents@1.8.6

## What's Changed
* fix(sarvam): close the streams the STT collects by @dhruvladia-sarvam in https://github.com/livekit/agents/pull/7058
* fix(aws): keep realtime session active after stream restart by @uuzzrm in https://github.com/livekit/agents/pull/6811
* fix(telemetry): format a loop stall report without reading source files by @zdurm in https://github.com/livekit/agents/pull/7616
* update deps by @davidzhao in https://github.com/livekit/agents/pull/7655
* fix(deps): bump bithuman in uv.lock for Windows wheel support by @abhijeetgaur-dev in https://github.com/livekit/agents/pull/7559
* fix(voice): keep preemptive generation when only non-ASCII punctuation changes by @ahmad65saad in https://github.com/livekit/agents/pull/7507
* fix(ipc): allow opting out of the local EOT weights in the preload by @Zaygal in https://github.com/livekit/agents/pull/7580
* fix(openai): prewarm Responses API connections by @nikhiljangid120 in https://github.com/livekit/agents/pull/7584
* feat(speechify): stream synthesize(), reuse the HTTP connection, add prewarm() by @vitalragaz in https://github.com/livekit/agents/pull/7543
* fix(tests): pin toxiproxy to v2.12.0 by @1egoman in https://github.com/livekit/agents/pull/7676
* fix(inference): keep temperature/top_p for gpt-5.1+ at reasoning_effort none by @adrian-cowham in https://github.com/livekit/agents/pull/7650
* fix(ipc): skip the EOT preload in spawned job processes by @longcw in https://github.com/livekit/agents/pull/7665
* fix(voice): enforce max_tool_steps on the realtime tool loop by @longcw in https://github.com/livekit/agents/pull/7555
* fix(mcp): tell the server when a tool call is cancelled by @longcw in https://github.com/livekit/agents/pull/7542
* fix(voice): store only the spoken part of a reply when the TTS fails by @longcw in https://github.com/livekit/agents/pull/7670
* fix(llm): diff a chat context in O(n log n) when its item ids are unique by @zdurm in https://github.com/livekit/agents/pull/7626
* fix(ipc): let one flag skip the whole local-inference preload by @longcw in https://github.com/livekit/agents/pull/7681
* fix(ipc): close the job loop when the runner exits by @zdurm in https://github.com/livekit/agents/pull/7630
* fix(gpt-live): remember the mute across a reconnect by @Zaygal in https://github.com/livekit/agents/pull/7675
* fix(tts): keep TTS.sample_rate in sync when update_options changes it by @Rehansanjay in https://github.com/livekit/agents/pull/7135
* bithuman: fix package description casing and add bitHuman docs URL by @sgu-bithuman in https://github.com/livekit/agents/pull/7677
* fix(voice): skip the AEC warmup in simulations by @chenghao-mou in https://github.com/livekit/agents/pull/7674
* fix: migrate soniox websocket authentication by @chenghao-mou in https://github.com/livekit/agents/pull/7698
* feat(sarvam): add bulbul:v4-flash TTS by @dhruvladia-sarvam in https://github.com/livekit/agents/pull/7335
* feat(nabrah): add Nabrah Arabic STT plugin by @MagdiWaleed in https://github.com/livekit/agents/pull/7337
* feat(cerebras): add qwen-3.8-27b to CerebrasChatModels by @abhijeetgaur-dev in https://github.com/livekit/agents/pull/7680
* docs(microsoft_ai): correct MAI STT/TTS availability in README by @tinalenguyen in https://github.com/livekit/agents/pull/7704
* livekit-agents@1.8.6 by @github-actions[bot] in https://github.com/livekit/agents/pull/7707

## New Contributors
* @abhijeetgaur-dev made their first contribution in https://github.com/livekit/agents/pull/7559
* @ahmad65saad made their first contribution in https://github.com/livekit/agents/pull/7507
* @Zaygal made their first contribution in https://github.com/livekit/agents/pull/7580
* @vitalragaz made their first contribution in https://github.com/livekit/agents/pull/7543
* @MagdiWaleed made their first contribution in https://github.com/livekit/agents/pull/7337

**Full Changelog**: https://github.com/livekit/agents/compare/livekit-agents@1.8.5...livekit-agents@1.8.6