Offline pipeline: snapshot_download the HF community dataset, parse
config/pair/lora JSONs into a phase1 dict per combo, featurize via
EstimatorFeatureExtractor, z-score-normalize, fit NearestNeighbors
(cosine), pickle to disk with meta.json sidecar recording the
hf_commit_sha, index version, feature dim, and build timestamp.
Compound arch filenames like `sd_unet` are parsed as a two-token
suffix so the leading token isn't mistakenly captured as a hash.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
