Google AI Platform LLMs now supported; voice pipeline race conditions fixed

What's Changed

• (openai realtime): add gpt-realtime-2 model str by @tinalenguyen in https://github.com/livekit/agents/pull/5791
• (healthcare example): remove filesearch and pdf by @tinalenguyen in https://github.com/livekit/agents/pull/5795
• chore(worker): update worker warnings AGT-2909 by @chenghao-mou in https://github.com/livekit/agents/pull/5771
• fix(voice): race between flush and clear_buffer on interrupt leaks unplayed transcript by @longcw in https://github.com/livekit/agents/pull/5798
• fix(vad): add support for vad reset directly without stream close by @chenghao-mou in https://github.com/livekit/agents/pull/5687
• feat(inworld tts): add delivery_mode parameter for inworld-tts-2 by @chrisackermann in https://github.com/livekit/agents/pull/5801
• fix(voice): wait for end-of-turn task when waiting for user inactivity by @longcw in https://github.com/livekit/agents/pull/5792
• Adding GnaniAI STT plugin by @Gnani-AI-Mintlify in https://github.com/livekit/agents/pull/5769
• (gnani): fix py.typed and remove changesets by @tinalenguyen in https://github.com/livekit/agents/pull/5816
• fix(voice): propagate ChatMessage.interrupted through proto serializer by @toubatbrian in https://github.com/livekit/agents/pull/5824
• fix(anthropic): recreate stream on retry by @he-yufeng in https://github.com/livekit/agents/pull/5820
• fix(llm): convert per-turn instructions on the very first turn too by @theomonnom in https://github.com/livekit/agents/pull/5828
• feat(background_audio): add fade_in / fade_out to AudioConfig by @theomonnom in https://github.com/livekit/agents/pull/5832
• fix(plugins/sarvam): thread language_probability into SpeechData.confidence by @hashirventhodi in https://github.com/livekit/agents/pull/5830
• fix(lemonslice): bind avatar audio output before the upstream session HTTP call by @theomonnom in https://github.com/livekit/agents/pull/5837
• feat(voice/avatar): kick avatar participant on aclose + wait_for_join helper by @theomonnom in https://github.com/livekit/agents/pull/5836
• feat(examples): add LemonSlice avatar with switchable personas by @theomonnom in https://github.com/livekit/agents/pull/5834
• chore(playground): list frontdesk first by @theomonnom in https://github.com/livekit/agents/pull/5838
• fix: 4xx errors should not be retryable by @davidzhao in https://github.com/livekit/agents/pull/5831
• livekit-agents@1.5.13 by @github-actions[bot] in https://github.com/livekit/agents/pull/5835
• feat(assemblyai): add continuous_partials and interruption_delay stre… by @dlange-aai in https://github.com/livekit/agents/pull/5819
• ci(deploy-examples): include avatar in matrix + wire LEMONSLICE_API_KEY by @theomonnom in https://github.com/livekit/agents/pull/5839
• docs: clarify MCP support bullet by @scosemicolon in https://github.com/livekit/agents/pull/5822
• fix(core): replace frame drop with silence frame AGT-2914 by @chenghao-mou in https://github.com/livekit/agents/pull/5815
• feat(plugins-soniox): surface per-run language segments end-to-end by @MSameerAbbas in https://github.com/livekit/agents/pull/5730
• use stt timestamps as last speaking time by @chenghao-mou in https://github.com/livekit/agents/pull/5672
• docs: fix Gemini model version in avatar example README by @detail-app[bot] in https://github.com/livekit/agents/pull/5842
• handle leaked chat-template tokens in function call args by @davidzhao in https://github.com/livekit/agents/pull/5840
• fix(voice): restrict stt pipeline reuse to default stt_node by @longcw in https://github.com/livekit/agents/pull/5803
• feat(google): integration for AI Platform LLMs by @davidzhao in https://github.com/livekit/agents/pull/5843
• fix: return function argument errors (ToolError) to LLM by @davidzhao in https://github.com/livekit/agents/pull/5846
• refactor(llm): unified ToolError contract for tool arg validation by @longcw in https://github.com/livekit/agents/pull/5807
• feat(openai): stream input_audio_transcription delta events by @longcw in https://github.com/livekit/agents/pull/5859
• fix(voice): block on_user_turn_exceeded during agent handoff by @longcw in https://github.com/livekit/agents/pull/5858
• fix(voice): reset user turn tracker on clear_user_turn by @longcw in https://github.com/livekit/agents/pull/5857
• fix(elevenlabs): always close TTS stream context on cancellation by @longcw in https://github.com/livekit/agents/pull/5845
• Update download-files deprecation message by @bcherry in https://github.com/livekit/agents/pull/5781
• fix(llm): preserve Field() constraints on function tool arguments by @theomonnom in https://github.com/livekit/agents/pull/5861
• fix(soniox): surface STT server errors by @he-yufeng in https://github.com/livekit/agents/pull/5864
• Fix ElevenLabs websocket context id handling by @flynn-hamming in https://github.com/livekit/agents/pull/5813
• livekit-agents@1.5.14 by @github-actions[bot] in https://github.com/livekit/agents/pull/5870

New Contributors

• @Gnani-AI-Mintlify made their first contribution in https://github.com/livekit/agents/pull/5769
• @he-yufeng made their first contribution in https://github.com/livekit/agents/pull/5820
• @hashirventhodi made their first contribution in https://github.com/livekit/agents/pull/5830
• @scosemicolon made their first contribution in https://github.com/livekit/agents/pull/5822
• @flynn-hamming made their first contribution in https://github.com/livekit/agents/pull/5813

Full Changelog: https://github.com/livekit/agents/compare/livekit-agents@1.5.12...livekit-agents@1.5.14