docs: refresh README for 3-tier architecture

- 3-tier dependency direction diagram + architecture rule
- Module table reorganized by tier (Generic / HmEG-aware / EgBim)
- Milestones: first E2E, raw scenario E2E (#14), 3-tier split, 126 tests
- Gap status (A~H done, Gap I deferred with Player fallback strategy)
- Directory tree updated to reflect post-refactor layout

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/history/2026-04-09_readme-refresh-and-push.md

@@ -0,0 +1,24 @@
+# 2026-04-09 — README 갱신 + 누적 커밋 push
+
+**이슈**: 없음 (세션 마무리 문서 작업)
+**소요 시간**: ~5분
+**Context 사용량**: input ~15k / output ~3k tokens (Opus 4.6)
+
+## 작업
+
+- `README.md`를 3-tier 아키텍처 반영해 전면 갱신
+  - 3계층(Generic / HmEG-aware / App-specific) 의존 방향 다이어그램 + 강제 규칙
+  - 모듈 표를 계층별로 재구성 (12개 csproj, 이동 후 경로)
+  - 주요 이정표 섹션: 2026-04-08 첫 E2E, Raw 시나리오 E2E, 2026-04-09 3-tier 분리, 126 tests
+  - Gap 현황 (A~H 완료, Gap I deferred + Player fallback 전략)
+  - 디렉터리 트리를 실제 3-tier 구조로 갱신
+- 누적 5개 커밋을 origin으로 push:
+  - `70bf570` player: raw scenario replay without manual cleanup (#14)
+  - `98d8014` player: active foreground wait
+  - `a771352` recorder: focus poller PoC for Gap I-1 (deferred)
+  - `f6b6e74` 3-tier split (step 1) + engine-bridge v3 scaffold
+  - `03fb504` BREAKING: 3-tier split step 2 + engine-bridge v3 EgBim lambdas wired
+
+## 관련
+
+- `README.md`