Pipeline(TfidfVectorizer(1-2gram, min_df=2) -> LogisticRegression(C=4)),
seed 20260721, 5620 rows, 300 checker-audited. Fidelity vs rule_check() = 1.0
in-distribution; unseen-paraphrase probe 0.8333 (n=12, honestly small).

Signed-off-by: Stephen Lutar <stephenlutar2@gmail.com>