[WIP] Gemini test

[thorwebdev]

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[devin-ai-integration]

Devin Review found 1 potential issue.

View 1 additional finding in Devin Review.

[devin-ai-integration]

🔴 Vertex AI speech-to-text mode always crashes on startup

The Vertex AI client is created with an unsupported option name (client_kwargs["enterprise"] = True at livekit-plugins/livekit-plugins-google/livekit/plugins/google/beta/gemini_stt.py:219) instead of the option the client actually accepts, so any attempt to use the enterprise/Vertex backend fails immediately.

Impact: Users who configure Gemini STT for Vertex AI (via credentials, project, location, or vertexai=True) get an error and cannot transcribe any audio.

Invalid Client keyword and downstream vertexai detection

The google.genai.Client constructor accepts a vertexai boolean (see gemini_tts.py:148, llm.py:261, realtime_api.py:490), not enterprise. Passing enterprise=True to Client(**client_kwargs) at gemini_stt.py:226 raises TypeError: __init__() got an unexpected keyword argument 'enterprise'.

Even if the constructor tolerated the extra kwarg, vertexai would never be enabled on the client, so the subsequent check getattr(client._api_client, "vertexai", False) at gemini_stt.py:232 would always be False and the configured language_hints/language would be silently dropped. The correct fix is to pass vertexai=True.

Suggested change

	client_kwargs["enterprise"] = True
	client_kwargs["vertexai"] = True

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