Function try_ncd_matrix_paths_backend_with_options 

pub fn try_ncd_matrix_paths_backend_with_options(
    paths: &[&str],
    backend: &CompiledCompressionBackend,
    variant: NcdVariant,
    options: NcdComputeOptions,
) -> InfotheoryResult<Vec<f64>>

Compute an n x n pairwise NCD matrix (row-major) for file paths with an explicit compiled compression backend and operation-level parallelism controls.