- Updated `SpeechmaticsSTTService` to use new Python Voice SDK with improved VAD,
  Smart Turn capabilities, and brings dramatic improvements to latency without
  any impact on accuracy. Use the `turn_detection_mode` parameter to control the
  endpointing of speech, with `TurnDetectionMode.EXTERNAL` (default),
  `TurnDetectionMode.ADAPTIVE`, or `TurnDetectionMode.SMART_TURN`.
  ```python
    stt = SpeechmaticsSTTService(
        api_key=os.getenv("SPEECHMATICS_API_KEY"),
        params=SpeechmaticsSTTService.InputParams(
            language=Language.EN,
            turn_detection_mode=SpeechmaticsSTTService.TurnDetectionMode.ADAPTIVE,
            speaker_active_format="<{speaker_id}>{text}</{speaker_id}>",
        ),
    )
  ```