{"demo": true, "label": "DEMO / STAGED FOOTAGE - synthetic shelf", "counts": {"synthetic-item": 3}, "total": 3, "tracks": [], "latency_ms": 0.0, "model": "yolo26n.onnx", "threshold": 0.35, "state": "Gap", "changed_ratio": 0.625, "annotated_image_base64": null, "note": "Stateless Lambda demo: synthetic sparse shelf (3 items) against a full synthetic baseline (8 items), so the Gap state is visible. No live camera, no OpenCV inference and no session tracking on Lambda. For full ShelfScan, run the FastAPI app from https://github.com/OlsOls4/opencv-hackathon-2026."}