Function set_comparison_threshold_by_id 

pub(crate) fn set_comparison_threshold_by_id(
    config_json: &str,
    cfrtn_id: i64,
    same_score: Option<i64>,
    close_score: Option<i64>,
    likely_score: Option<i64>,
    plausible_score: Option<i64>,
    un_likely_score: Option<i64>,
) -> Result<String>

Internal: Set comparison threshold by ID (for FFI use)