livekit-agents@1.5.9

## Introducing Answering Machine Detection

An outbound call can reach a person, voicemail, an IVR menu, or a number that can't accept messages. Answering machine detection (AMD) listens to the start of the call, classifies it with an LLM, and returns a result so your agent can respond appropriately.

Read more about using AMD in [our blog](https://livekit.com/blog/answering-machine-detection).


## What's Changed
* fix(fishaudio): prevent TTS generation hang by @davidzhao in https://github.com/livekit/agents/pull/5649
* add comments to agent side and inference side fallback adapters by @tmshapland in https://github.com/livekit/agents/pull/5654
* fix(amd): fix negative zero in amd delay calculation by @chenghao-mou in https://github.com/livekit/agents/pull/5650
* fix(async-toolset): use underscore in synthetic call_id by @longcw in https://github.com/livekit/agents/pull/5656
* fix(console): set mock participant state to active by @longcw in https://github.com/livekit/agents/pull/5645
* Update LemonSlice integration to use wait_playback_start by @jp-lemon in https://github.com/livekit/agents/pull/5655
* Fix the memory leak of Google STT when no audio input. by @jmuk in https://github.com/livekit/agents/pull/5591
* ci(examples): add separate file for workflow by @tinalenguyen in https://github.com/livekit/agents/pull/5651
* fix: wording in missing required argument error by @carschandler in https://github.com/livekit/agents/pull/5659
* chore(amd): add uncertain branch in example by @chenghao-mou in https://github.com/livekit/agents/pull/5658
* docs(agents): document realtime capabilities by @shizhigu in https://github.com/livekit/agents/pull/5598
* fix(elevenlabs): restore chunk_length_schedule in WS init payload by @IanSteno in https://github.com/livekit/agents/pull/5006
* fix(voice): prevent scheduling deadlock when pipeline task crashes by @theomonnom in https://github.com/livekit/agents/pull/5678
* (elevenlabs tts): add apply_language_text_normalization param by @tinalenguyen in https://github.com/livekit/agents/pull/5679
* (gemini llm): add service tier param by @tinalenguyen in https://github.com/livekit/agents/pull/5680
* Emit AgentConfigUpdate in OTLP session logs by @theomonnom in https://github.com/livekit/agents/pull/5601
* fix(core): clean up variables when committing a user turn manually by @chenghao-mou in https://github.com/livekit/agents/pull/5671
* (deepgram stt): add redact param by @tinalenguyen in https://github.com/livekit/agents/pull/5692
* fix(agents): persist _speech_start_time across intra-turn VAD bursts by @AlessandroElyos in https://github.com/livekit/agents/pull/5585
* fix: pass API key via header in Neuphonic and Murf WebSocket TTS by @u9g in https://github.com/livekit/agents/pull/5691
* fix(core): make default user span time explicit by @chenghao-mou in https://github.com/livekit/agents/pull/5699
* require CanManageAgentSession grant for remote session by @theomonnom in https://github.com/livekit/agents/pull/5487
* test(examples/survey): add TaskGroup testing reference (DOCS-1225) by @kath0la in https://github.com/livekit/agents/pull/5557
* fix(anthropic): raise default httpx read timeout for streaming; add configurable timeout param by @SuperMarioYL in https://github.com/livekit/agents/pull/5529
* fix(examples): consistent CSV schema in survey_agent by @u9g in https://github.com/livekit/agents/pull/5689
* Adding fine-grained VAD params to Sarvam saaras:v3 STT plugin by @dhruvladia-sarvam in https://github.com/livekit/agents/pull/5563
* Update codec config, MIME mapping, and interruption handling by @dhruvladia-sarvam in https://github.com/livekit/agents/pull/5561
* (gradium): update endpoint by @tinalenguyen in https://github.com/livekit/agents/pull/5722
* Revert "require CanManageAgentSession grant for remote session (#5487)" by @chenghao-mou in https://github.com/livekit/agents/pull/5714
* feat(gemini llm): add media resolution option to LLM and RealtimeModel by @csanz91 in https://github.com/livekit/agents/pull/5712
* (inworld tts): add language param by @tinalenguyen in https://github.com/livekit/agents/pull/5723
* fix(core): surface real http_context error from STT streams by @longcw in https://github.com/livekit/agents/pull/5709
* docs: clarify function tools executed event pairing by @nightcityblade in https://github.com/livekit/agents/pull/5701
* feat(workflows): expose dtmf and ringing_timeout on WarmTransferTask by @a-gasior in https://github.com/livekit/agents/pull/5721
* fix(agents): await realtime auto tool reply in RunResult by @longcw in https://github.com/livekit/agents/pull/5702
* chore(amd): update default models and default behavior by @chenghao-mou in https://github.com/livekit/agents/pull/5713
* Add Perplexity LLM plugin by @jliounis in https://github.com/livekit/agents/pull/5610
* fix: raise on unexpected ElevenLabs websocket close by @nightcityblade in https://github.com/livekit/agents/pull/5729
* fix(agents): clear pending auto tool reply future on timeout by @u9g in https://github.com/livekit/agents/pull/5725
* (azure + perplexity): bump versions by @tinalenguyen in https://github.com/livekit/agents/pull/5731
* fix: do not republish tracks on reconnect by @davidzhao in https://github.com/livekit/agents/pull/5698
* chore(amd): add default amd prediction log by @chenghao-mou in https://github.com/livekit/agents/pull/5732
* feat(rime): add WebSocket streaming TTS support by @mcullan in https://github.com/livekit/agents/pull/5663
* livekit-agents@1.5.9 by @github-actions[bot] in https://github.com/livekit/agents/pull/5733

## New Contributors
* @jmuk made their first contribution in https://github.com/livekit/agents/pull/5591
* @shizhigu made their first contribution in https://github.com/livekit/agents/pull/5598
* @SuperMarioYL made their first contribution in https://github.com/livekit/agents/pull/5529
* @nightcityblade made their first contribution in https://github.com/livekit/agents/pull/5701
* @a-gasior made their first contribution in https://github.com/livekit/agents/pull/5721
* @jliounis made their first contribution in https://github.com/livekit/agents/pull/5610

**Full Changelog**: https://github.com/livekit/agents/compare/livekit-agents@1.5.8...livekit-agents@1.5.9