Function try_reference_post_process 

pub fn try_reference_post_process(
    matches: &[ByteRange],
    haystack: &[u8],
) -> Result<Vec<PostProcessedMatch>, PostProcessError>

Fuse dedup_regions_inplace, entropy-per-span, and confidence into one Reference oracle pass over the input.

Returned vector is sorted by (pid, start, end) (the dedup post-condition). haystack is the same byte buffer the matcher scanned.

Errors

Returns PostProcessError::InvalidRange if any deduped match points outside haystack.