Pop Data-engine

Using only Pop Data-Engine built in Rust - no YOLO, no trained models and no GPU! Indexing video real time and analyzing it on the go. I spent an evening playing with my engine and live public webcam feed to see if I could track people in real time - so please treat it as it is, just a proof the idea works. I used only geometry and gait heuristics (aspect ratio, shoulder-to-leg taper, periodic wobble while walking) to decide what's actually a person vs a shadow, a sign, or a lamp post. It still needs a lot of work but result right now: 60+ FPS on CPU, live tracking with stable IDs, on a public