Fix: Add MIT license YAML frontmatter to README

Fix: re-upload M172_calibrated.onnx (correct hash matching chain commitment)

Add extrinsic record

Upload README.md with huggingface_hub

Upload model.onnx with huggingface_hub

Add README

Add MIT license

Upload M172 calibrated model (XGB MAE d10 R+Z zw1, power-law bias correction)

initial commit