Update README.md

refactor: replace tutorial-style messages with production-grade log output

add edge_client.py for appendix B.8

improve UI and add demo sample support

Remove old EfficientNet-B0 model, keep ResNet18 only

Switch model to ResNet18, update app and dependencies

Fix: HF Spaces Dockerfile (UID 1000, port 7860, single worker), update onnxruntime>=1.18.1

Add Flask PV defect classifier app with EfficientNet-B0 ONNX model

initial commit