ChangeSafe Competition Demo v1

Public competition demo generated from the permanent hosted ChangeSafe application. Runtime: 2:53.93. Format: 1920x1080 H.264/AAC, 30 fps. Evidence boundary: checksum-pinned recorded DataHub context; production rows were not queried; approval is preview-only and non-mutating. Includes captions, narration script, poster, and machine-readable verification.