Function evaluate_tokens_aligned 

pub fn evaluate_tokens_aligned(
    gold_tokens: &[GoldToken],
    pred_tokens: &[Token],
) -> (usize, usize, usize, usize)

Greedy alignment 기반 토큰 평가 (strict 기본).

evaluate_tokens_aligned_with_pos_match를 pos_eq_strict로 호출.