chore: record pre-existing uncommitted repository state

Snapshot of the in-flight state that already existed, identically, in both
this worktree and the main checkout before this session began: the initial
HTTP Client platform implementation (previously untracked), the redis-lab
removal, and the JPA / object-storage / notification integration work.

Kept separate from this session's HTTP Client review response, which lands
in the following commit, so the two bodies of work stay reviewable apart.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

httpclient-superpowers-package/README.md

@@ -0,0 +1,23 @@
+# HTTP Client Superpowers 설계 패키지
+
+이 패키지는 `Java/Spring 외부 HTTP Client 플랫폼 설계 심층 리서치`를 기반으로 작성한 설계서와 구현 계획서다.
+
+## 파일
+
+- `docs/superpowers/specs/2026-08-08-httpclient-platform-design.md`
+- `docs/superpowers/plans/2026-08-08-httpclient-platform-implementation-plan.md`
+- `VALIDATION.md`
+- `validate_httpclient_docs.py`
+
+## 구현 기준
+
+- Java 21
+- Gradle Kotlin DSL
+- 공통 API는 Spring Framework 6.2 기준
+- Spring Framework 7.0 호환성 검증
+- Apache HttpClient 5 + RestClient
+- JDK HttpClient + RestClient
+- Reactor Netty + WebClient
+- Jetty HTTP/3 Experimental
+
+실제 Backend Skeleton 저장소가 제공되지 않았으므로 package 경로와 Gradle 구조는 설계서의 명시적 구현 가정이다. 구현 전 저장소의 기존 convention과 root package에 맞춰 경로만 조정하고 공개 계약과 정책 의미론은 유지한다.