Function get_block_range_for_ns_proof 

async fn get_block_range_for_ns_proof<S>(
    req: &RequestParams,
    state: &S,
    limit: usize,
    timeout: Duration,
) -> Result<Vec<(BlockQueryData<SeqTypes>, VidCommonQueryData<SeqTypes>)>, Error>
where
    S: ReadState,
    S::State: AvailabilityDataSource<SeqTypes> + Sync,