Sync regenerated figures and summaries for all tiers

Record H1 nuance, four-scalar count and erratum pointer in the card

Add erratum for the manifest ledger and git_dirty defects

Upload folder using huggingface_hub

Upload calibration.json with huggingface_hub

Upload env/requirements.lock.txt with huggingface_hub

Upload artifacts/split.json with huggingface_hub

Upload README.md with huggingface_hub

initial commit