Wiki cleanup: error-doc removal, dedup merge, link normalization

10_Wiki/Topics 대규모 정리:
- 오류 캡처/미완성 stub 문서 227개 제거
- 교차폴더 중복 43클러스터 병합 (63파일 → redirect)
- 링크명 정규화: 깨진 링크 수정·redirect 직결·개념 매핑 ~2,400건
- 카테고리 MOC 6개 신규 생성
- Graph 섹션 미해결 related-keyword 링크 10,058건 제거

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

10_Wiki/Topics/Architecture/Testability_Architecture.md

@@ -181,7 +181,7 @@ class CartPresenter {
 - 부모: [[Technical-Architecture]] · [[Test-Driven_Development]]
 - 변형: [[Hexagonal Architecture]] · [[Clean Architecture]]
 - 응용: [[Dependency Injection]] · [[Test Doubles (테스트 대역)]]
-- Adjacent: [[Working Effectively with Legacy Code]] · [[Test Automation Pyramid]] · [[The Two Hats]]
+- Adjacent: [[Test Automation Pyramid]] · [[The Two Hats]]
 
 ## 🤖 LLM 활용
 **언제**: refactor for testability, seam identification, DI introduction.