docs: make benchmark validation reproducible
#1
by betterwithage - opened
README-only: explicit train split, exact seven-case validation matrix pinned to immutable fixture/verifier commits, and fail-closed scope/limitations. No fixture or license changes.
Validated PR head: README-only; card/config parse; direct load 7/7 rows; all 7 fixture outcomes reproduced with pinned verifier; fixture byte-diff invariants pass.
betterwithage changed pull request status to merged