egoSample/faberu: 640-wide previews (~500 kbps, 31 MB), parallel point-cloud fetch, accumulated environment map

egoSample/faberu: preview videos re-encoded to MEgo spec (480-wide, ~200 kbps): 60 MB -> 12 MB

egoSample: add Robot Ego · Multi-Sensor Capture category (planned) with Faber U shelf-restocking episode

egoSample: add Jizhi Stereo photo keychain crafting (Creative Workshops)

egoSample: unified scenario-grouped viewer (5 MEgo 5-cam tasks + 6 PICO demos)