@spec append_event(term(), term()) :: :ok | {:error, term()}

@spec delete_history(term()) :: :ok

@spec delete_session(term()) :: :ok

@spec delete_session_index(term()) :: :ok

@spec finalize(term(), term()) :: :ok | {:error, term()}

@spec get(binary()) :: term()

@spec history(
  term(),
  keyword()
) :: list()

@spec list_sessions() :: [{term(), map()}]