wald 0.2.0

New static class: leakage-temporal-shuffle — shuffled splits on time-ordered data (default train_test_split or shuffled KFold over lag/rolling features), detected per evaluation sink on that sink's dependency chain. 16 execution-verified mutants at precision 1.00 / recall 1.00; clean false-positive rate 0.0% on the 83-notebook corpus (56 synthetic + 27 real). Adversarial review closed four confirmed false-positive shapes (neighbor-comparison features on score/rank/price-sorted frames) before release; four evasion shapes are documented residual risk. Full numbers: evals/2026-07-05-eval.json.