docs(release): v0.20.1 release notes draft + spec/plan dogfood cross-link
#1 (사용자 요청): release notes draft 작성 + spec/plan 의 dogfood
evidence cross-link 보강.
docs/release-notes/v0.20.1-draft.md (신규):
- 4 단락 본문 (한국어 2자 query 지원 + 영어 substring 회귀 + V007→V009
자동 backfill + ingest 성능 영향).
- Migration cascade table (lexical_index_version, corpus_revision,
wire schema shape preservation).
- API + dependency 변경 (lindera v3, lindera-ko-dic v3, retired
short_query_hint helper, 새 facade APIs).
- Breaking changes 명시 (영어 substring 회귀, 첫 부팅 latency, DB/
binary 크기 증가).
- Upgrade 절차 + Known limitation + 14 dogfood scenario reference.
spec Appendix B (segmentation evidence):
- "Empirical verification (2026-05-28 dogfood — post-merge update)"
subsection 신규. prior-knowledge 가정 vs 실측 결과 table. Scenario
1-4 모두 verified 표시. ko-dic 의 '서울특별시' → '[서울, 특별시]'
분해 증거 명시.
plan Changelog:
- post-implementation entry: 22 commit on branch, S3 blockers, S7
cascade, S11 sanity regression updates, opus PR review 4 finding
fixes.
- dogfood evidence entry: 14 scenario verify pass, ko-dic 분해
evidence, HOTFIXES + spec Appendix B cross-link.
Spec: …spec…md Appendix B
Plan: …plan…md (post-implementation + dogfood evidence Changelog)
Release notes: docs/release-notes/v0.20.1-draft.md
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