Demote to pointer: canonical is csoai/gspc-gov

point to canonical csoai/gspc-gov

fix: pin configs so datasets-server loads (was CastError on multi-schema glob)

Upload README.md with huggingface_hub

card: regenerate from measured data — single H1, correct n, measured difficulty/spread/usable_n, and the honest limit that this axis is not yet quotable

A+++ AEO/branded card: GSPC family cross-links, keyword frontmatter

Improve govbench card: structure, accurate item counts, honest-scope section

Initial benchmark spray (register-law clean)