feat(retrieval): 청킹/평가 하니스 + 검색 인덱스 개선

- src/retrieval/chunker.ts: 문서 청킹 로직 추가
- src/retrieval/evalHarness.ts + src/extension/evalCommands.ts: 검색 품질 평가 하니스
- brainIndex.ts / retrieval/index.ts / memoryContext.ts: 인덱싱·컨텍스트 빌더 개선
- config.ts / extension.ts / sidebarProvider.ts / package.json 갱신
- ADR-0030~0032 및 개발 기록, .astra 런타임 상태 동기화

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/records/ConnectAI/timeline.md

@@ -234,3 +234,15 @@
 
 ## 2026-06-01
 - Auto bug record created: bugs\BUG-0015-짚어둘-관찰-사항-참고용-face-api-js-환경-face-api-js는-원래-브라우저용입니다-node-단.md
+
+## 2026-06-05
+- Auto decision record created: decisions\ADR-0030-outlook에서도-이메일-내용을-가져올-수-있나.md
+
+## 2026-06-08
+- Auto decision record created: decisions\ADR-0031-아래-프로젝트의-로직을-분석하고-어떻게-하면-astra가-더-정확하고-정교하게-개선할-수-있는-부분이-있는지.md
+
+## 2026-06-08
+- Auto decision record created: decisions\ADR-0032-아래-프로젝트의-로직을-분석하고-어떻게-하면-astra가-더-정확하고-정교하게-개선할-수-있는-부분이-있는지.md
+
+## 2026-06-08
+- Auto development record created: development\2026-06-08_아니-지금-코드-업데이트를-했거든-다시-코드를-검토하고-의견을-줘_implementation.md