@type t() :: %VoxRtcServer.SessionConfig{
  include_word_timestamps: boolean(),
  language: String.t() | nil,
  policy: VoxRtcServer.TurnPolicy.t() | nil,
  sample_rate: non_neg_integer() | nil,
  stt_model: String.t() | nil,
  tts_model: String.t() | nil,
  turn_detector: String.t() | nil,
  turn_profile: String.t() | nil,
  vad_backend: String.t() | nil,
  voice: String.t() | nil
}