build_hamilton.py: LXX slice now HF-native via septuagint-lxx.lexeme (lemma column ships empty; lexeme is the lemma form). Closes the last clean-env gap for Hamilton.
build_hamilton.py: HF-native — Hebrew via NuBerea/macula-hebrew, Latin via NuBerea/vulgate-primitives token+nt_token; LXX still local-only with documented error and TODO
build.py: HF-native — replace local sibling parquet reads with load_hf_or_local; concept_centroids derived from concept-graph/concept_node; concept_drift inline-computed from concept-trajectories