fix(openai): honor realtime base URL env fallback

[rosetta-livekit-bot]

Summary

The OpenAI realtime model ignored the OPENAI_BASE_URL environment variable. When no base_url was passed (and not using Azure), it fell back to a hardcoded OPENAI_BASE_URL = "https://api.openai.com/v1" constant rather than reading the env var.

This was inconsistent with:

• The LLM path (llm.py), which forwards base_url=None to openai.AsyncClient, letting the OpenAI SDK read OPENAI_BASE_URL.
• The STT/TTS path (utils.get_base_url), which falls back to os.getenv("OPENAI_BASE_URL", ...).
• The realtime constructor's own docstring, which states: "If not provided, uses OPENAI_BASE_URL for OpenAI."

Change

-                base_url_val = OPENAI_BASE_URL
+                base_url_val = os.getenv("OPENAI_BASE_URL", OPENAI_BASE_URL)

The passed base_url still takes precedence when given (is_given(base_url)); the env var is only used as the fallback, matching the other code paths. The hardcoded constant remains the final default.

🤖 Generated with Claude Code

[changeset-bot]

🦋 Changeset detected

Latest commit: 43523a9

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-openai	Patch
@livekit/agents-plugin-anam	Patch
@livekit/agents-plugin-cartesia	Patch
@livekit/agents-plugin-cerebras	Patch
@livekit/agents-plugin-elevenlabs	Patch
@livekit/agents-plugin-fishaudio	Patch
@livekit/agents-plugin-google	Patch
@livekit/agents-plugin-hume	Patch
@livekit/agents-plugin-inworld	Patch
@livekit/agents-plugin-neuphonic	Patch
@livekit/agents-plugin-perplexity	Patch
@livekit/agents-plugin-rime	Patch
@livekit/agents-plugin-sarvam	Patch
@livekit/agents-plugin-xai	Patch
@livekit/agents	Patch
@livekit/agents-plugin-assemblyai	Patch
@livekit/agents-plugin-baseten	Patch
@livekit/agents-plugin-bey	Patch
@livekit/agents-plugin-deepgram	Patch
@livekit/agents-plugin-hedra	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-phonic	Patch
@livekit/agents-plugin-resemble	Patch
@livekit/agents-plugin-runway	Patch
@livekit/agents-plugin-silero	Patch
@livekit/agents-plugin-tavus	Patch
@livekit/agents-plugin-trugen	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.