Function try_ncd_paths_compiled_backend_with_options 

pub fn try_ncd_paths_compiled_backend_with_options(
    x: &str,
    y: &str,
    backend: &CompiledCompressionBackend,
    variant: NcdVariant,
    options: NcdComputeOptions,
) -> InfotheoryResult<f64>

Compute NCD for two files with an explicit compiled compression backend and explicit operation-level parallelism controls.