Repair CAffNet transformer piecewise claim

claim 5: run the safety-critical unicycle control experiment (CBF constraints, 3 obstacles)

claim 4: run the piecewise-constraint benchmark (CAffNet-FF/TF vs NN and HardNet)

Publish independent CAffNet hard-constraint reproduction

Upload app.py with huggingface_hub

Upload requirements.txt with huggingface_hub

Upload README.md with huggingface_hub

initial commit