hyungi_document_server

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hyungi 3b753f18d6 fix(search): Phase 2Q result dedup — apply_diversity unlimited path doc_id inflation 차단

PR-2Q-Search-Result-Dedup. measurement chain 의 마지막 cleanup. plan inline.

root cause: apply_diversity 의 top_score ≥ 0.90 → unlimited path (diversity 제약 해제)
→ 같은 doc 의 N chunks 가 results 에 박제 → returned_ids 에 doc.id 중복 → 모든 graded
metric inflation. multi-query 의 reranker score 가 자주 0.90+ → 다수 case 영향.

변경 (baseline path 영향 0, multi-query 전용 invariant):
- app/services/search/search_pipeline.py:
  · _dedup_results_by_doc_id() helper 신규 (doc.id first-only, top score 보존)
  · search_with_rewrite() 의 rerank path 에 apply_diversity(top_score_threshold=2.0)
    강제 + 후속 _dedup_results_by_doc_id 적용
  · rerank=False path 도 _dedup_results_by_doc_id(unified_docs) 적용
- tests/test_query_rewriter.py — 신규 4 test (55/55 PASS)

🎯 진짜 측정값 (모든 dedup layer 적용, 51 case gemma):
  cold: NDCG 0.663 / Recall t≥2 0.729 / Recall t≥3 0.761 / p50 3692ms / p95 9992ms
  warm: NDCG 0.659 / Recall t≥2 0.721 / Recall t≥3 0.739 / p50 1588ms / p95 3514ms
  baseline (rewrite_backend=null): NDCG 0.644 / Recall t≥2 0.699 / Recall t≥3 0.761 / p50 378ms
  Dedup audit: gemma 0/51 ✓ 정상 (fix 작동, eval-dedup 42/51 → 0/51 회복)

Δ vs baseline (진짜 multi-query 효과):
  NDCG +0.019 (cold) / +0.015 (warm) — sub-noise level
  Recall t≥2 +0.030 (cold) / +0.022 (warm) — 소량 개선
  Recall t≥3 0.000 / -0.022 — 동등~약간 회귀
  latency p50 +876% (cold) / +320% (warm) — major cost
  category: english/standards/mixed 약간 우세 / exam/korean 약간 회귀

measurement chain 정정 history:
  Phase 3 (a41adb6) 0.927 — chunk_id 중복 inflation
  Rerank-Fix (b734fc5) 0.876 — doc_id 중복 잔재
  Eval-Dedup (3553573) 0.641 — eval layer 만 dedup
  Result-Dedup (본 PR) 0.663 — production + eval 둘 다 dedup ← 정확값

사용자 결정 필요 (3 path, json 박제):
  (a) rollback — marginal 개선이 latency cost 정당화 X
  (b) opt-in 유지 + PR-2Q-Cache-Prewarm 진입 (warm path 만 노출)
  (c) 1주 관찰 종료 후 (2026-05-31) 재결정 (현 상태 유지)

산출물:
  reports/v0_2_phase2q_result_dedup_gemma_{cold,warm}_2026-05-24.csv
  tests/search_eval/baselines/v0_2_phase2q_result_dedup_2026-05-24.json (요약 + 사용자 결정 옵션)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-24 04:48:50 +00:00

baseline_2026-04-07_summary.md

test(search): Phase 0.2 baseline 측정 결과

2026-04-07 08:22:53 +09:00

baseline_2026-04-07.csv

test(search): Phase 0.2 baseline 측정 결과

2026-04-07 08:22:53 +09:00

baseline_order_unit_2026-04-20.csv

chore(reports): Phase 1/2 baseline + 2026-04~05 평가·관측 자료 보존

2026-05-15 04:45:56 +00:00

freshness_decay_observation_baseline.json

ops(search): PR-RAG-Time-1 1주 후 재측정 PASS