Function associate_score 

pub fn associate_score(
    c: &CandidateResult,
    total_dim_hits: usize,
    total_memory_count: u32,
    params: &AlgoParams,
) -> UnitScore

Compute the association score (range [0, 1]).

• candidate: candidate discovery result (includes Jaccard similarity).
• total_dim_hits: total number of dimensions hit.
• total_memory_count: current total memory count (used for cold-start warm-up, 03 §2.3).
• params: configurable algorithm parameters (weights/bonuses/penalties).