eval: record scifact + cmteb public-anchor calibration (Milestone B)#9
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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>
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Milestone B, rebased onto main (codex/M3). Records scifact + cmteb public-anchor calibration in reports/BASELINES.md. Supersedes #6 (auto-closed when #5's base branch was deleted during the stacked squash-merge).
Retrieval baselines are embedder-driven (Gitee Qwen3-Embedding-0.6B@1024, unchanged by the M2.7→M3 LLM bump); the LLM is unused for retrieval-only anchor eval.
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