First real-vector baselines, validating the eval chain end-to-end on
non-saturated, literature-anchored data (the Phase 0→1 advance criterion).

- scifact (en): doc/hybrid ndcg_at_10 0.689 — matches BEIR literature 0.67
  (Δ 0.019, within ±0.10) and clears dikw-core's committed floor. RRF lift real
  (bm25 0.651 < vector 0.673 < hybrid 0.689).
- cmteb-t2-subset (zh): reproduces dikw-core's calibrated subset baseline within
  noise (bm25 ndcg_at_10 0.840 exact; hybrid 0.946 vs 0.952; vector 0.943 vs
  0.942); clears all dataset thresholds. jieba CJK confirmed (0.840, not the
  degenerate 0.031). NB: this is a curated 300-q subset, not the full CMTEB
  leaderboard (~0.50) — see its dataset.yaml.
- Cross-cutting: multi-batch embedding confirmed (5183 / 5000 chunks ≫ 16/batch,
  the Phase 0 gap); read-only held (scifact materialized into gitignored paths,
  dataset.yaml restored, dikw-core tree clean).

No gates set — calibration only; per-language thresholds wait for the in-house
domain-bilingual-v1 / negatives-ood-v1 sets.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>