User turn limits interrupt long speech; avatar metrics track latency

What's Changed

• feat(examples): publish examples manifest to agents-jukebox by @theomonnom in https://github.com/livekit/agents/pull/5751
• deploy-examples: open a PR (with auto-merge) for the manifest refresh by @theomonnom in https://github.com/livekit/agents/pull/5760
• frontdesk: fix tz crash on deploy + survive failed startup by @theomonnom in https://github.com/livekit/agents/pull/5761
• deploy-examples: fix manifest publishing (\u escapes + --force push) by @theomonnom in https://github.com/livekit/agents/pull/5762
• chore(deps): update actions/setup-python action to v6 by @renovate[bot] in https://github.com/livekit/agents/pull/5759
• deprecate mcp_servers param on Agent and AgentSession by @longcw in https://github.com/livekit/agents/pull/5667
• feat(voice): add UserTurnLimitOptions to interrupt long user speech by @longcw in https://github.com/livekit/agents/pull/5492
• feat(avatar): add AvatarMetrics for join latency and playback latency by @longcw in https://github.com/livekit/agents/pull/5581
• docs(inference): fix stale RPC method names and LLM swap description by @detail-app[bot] in https://github.com/livekit/agents/pull/5764
• (speechmatics stt): update default mode to external by @tinalenguyen in https://github.com/livekit/agents/pull/5765
• docs: fix misquoted greeting punctuation in frontdesk README by @detail-app[bot] in https://github.com/livekit/agents/pull/5746
• fix(cerebras): require openai>=2.16.0 for FinalRequestOptions.content by @u9g in https://github.com/livekit/agents/pull/5773
• livekit-agents@1.5.11 by @github-actions[bot] in https://github.com/livekit/agents/pull/5774
• fix(soniox): plugin reliability fixes by @mihafabcic-soniox in https://github.com/livekit/agents/pull/5770
• (gemini): add gemini-3.5-flash model str by @tinalenguyen in https://github.com/livekit/agents/pull/5775
• Add Perplexity Agent API (Responses) LLM by @jliounis in https://github.com/livekit/agents/pull/5772
• examples(inference): editable system prompt + "Open in Builder" + Sonic-3 / 4.1-mini defaults by @JackNDwyer in https://github.com/livekit/agents/pull/5776
• feat(realtime): support multi-message generation per response by @longcw in https://github.com/livekit/agents/pull/5763
• feat(openai stt): support gpt-realtime-whisper by @longcw in https://github.com/livekit/agents/pull/5779
• feat(rime): add time_scale_factor parameter for arcana, mistv3, and coda by @MaCaki in https://github.com/livekit/agents/pull/5778
• (perplexity responses): update default model by @tinalenguyen in https://github.com/livekit/agents/pull/5780
• fix(interruption): incorrect guard skips true interruptions by @chenghao-mou in https://github.com/livekit/agents/pull/5787
• docs(perplexity): fix stale default model in responses.LLM example by @detail-app[bot] in https://github.com/livekit/agents/pull/5785
• add new bulbul:v3 speaker voices by @amlesh-dev in https://github.com/livekit/agents/pull/5782
• livekit-agents@1.5.12 by @github-actions[bot] in https://github.com/livekit/agents/pull/5789

New Contributors

• @mihafabcic-soniox made their first contribution in https://github.com/livekit/agents/pull/5770
• @JackNDwyer made their first contribution in https://github.com/livekit/agents/pull/5776
• @amlesh-dev made their first contribution in https://github.com/livekit/agents/pull/5782

Full Changelog: https://github.com/livekit/agents/compare/livekit-agents@1.5.10...livekit-agents@1.5.12