mlx-bun library API
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    AudioService: Pick<
        TranscriptionService,
        | "modelId"
        | "resolveModel"
        | "resident"
        | "stats"
        | "unload"
        | "transcribe"
        | "createSession"
        | "session"
        | "decodeAudio",
    >

    What the handlers borrow from the service.