Function prepare_responses_continuation_request 

pub fn prepare_responses_continuation_request<'a, M>(
    provider_name: &str,
    provider_supports_responses_compaction: bool,
    messages: &'a [M],
    continuation: Option<&ResponsesContinuationState<M>>,
) -> PreparedResponsesRequest<'a, M>
where
    M: Clone + PartialEq,