feat(assemblyai): add continuous partial options

[rosetta-livekit-bot]

Summary

Exposes two new Universal-3 Pro Streaming connection parameters on the AssemblyAI plugin:

• continuous_partials (bool) — emit a steady stream of non-final partials approximately every 3 seconds while speech continues, regardless of silence. Useful for long, uninterrupted turns (e.g. a caller reading out a credit card number) where silence-based partials don't fire often enough. Supports mid-session toggling via update_options().
• interruption_delay (int, ms, range 0–1000, default 500) — tunes how soon the first early partial is emitted, directly affecting time-to-first-token. Lower values give faster TTFT for barge-in / speculative inference; higher values produce more confident first partials. Constructor-only.

Both parameters are u3-rt-pro–only; a ValueError is raised at construction if used with any other model.

Docs:

• https://www.assemblyai.com/docs/api-reference/streaming-api/universal-3-pro-streaming/universal-3-pro-streaming#request.query.continuous_partials
• https://www.assemblyai.com/docs/api-reference/streaming-api/universal-3-pro-streaming/universal-3-pro-streaming#request.query.interruption_delay

Test plan

• Unit tests added in tests/test_plugin_assemblyai_stt.py covering default, set, model-guard, alias rewrite, and dynamic update (for continuous_partials)
• make check passes (ruff format + lint + mypy strict)
• uv run pytest tests/test_plugin_assemblyai_stt.py — 20/20 pass
• Verified locally against the real AssemblyAI streaming endpoint: connection accepted with continuous_partials=true&interruption_delay=200, server returns Begin with
  model=u3-rt-pro

[changeset-bot]

🦋 Changeset detected

Latest commit: 76e173e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 33 packages

Name	Type
@livekit/agents-plugin-assemblyai	Patch
@livekit/agents	Patch
@livekit/agents-plugin-anam	Patch
@livekit/agents-plugin-baseten	Patch
@livekit/agents-plugin-bey	Patch
@livekit/agents-plugin-cartesia	Patch
@livekit/agents-plugin-cerebras	Patch
@livekit/agents-plugin-deepgram	Patch
@livekit/agents-plugin-elevenlabs	Patch
@livekit/agents-plugin-fishaudio	Patch
@livekit/agents-plugin-google	Patch
@livekit/agents-plugin-hedra	Patch
@livekit/agents-plugin-hume	Patch
@livekit/agents-plugin-inworld	Patch
@livekit/agents-plugin-lemonslice	Patch
@livekit/agents-plugin-liveavatar	Patch
@livekit/agents-plugin-livekit	Patch
@livekit/agents-plugin-minimax	Patch
@livekit/agents-plugin-mistral	Patch
@livekit/agents-plugin-mistralai	Patch
@livekit/agents-plugin-neuphonic	Patch
@livekit/agents-plugin-openai	Patch
@livekit/agents-plugin-perplexity	Patch
@livekit/agents-plugin-phonic	Patch
@livekit/agents-plugin-resemble	Patch
@livekit/agents-plugin-rime	Patch
@livekit/agents-plugin-runway	Patch
@livekit/agents-plugin-sarvam	Patch
@livekit/agents-plugin-silero	Patch
@livekit/agents-plugin-tavus	Patch
@livekit/agents-plugin-trugen	Patch
@livekit/agents-plugin-xai	Patch
@livekit/agents-plugins-test	Patch

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 2 additional findings.