docs(req): dcy-020 confirm-req(REQ-056~065 Approved) + 기존 REQ supersession change-req

- confirm-req: REQ-056~065 Proposed→Approved (CHG-20260610-02 각). srs/index Register Approved.
- change-req(forward-looking): REQ-002/003/005/006/007 에 dcy-020 재정의/폐기 예정 기록
  (CHG-20260610-01). 현재 코드 불변이라 status Implemented 유지(keep-current);
  실제 폐기/재정의·status 전환은 dcy-020 delivery 배치에서 확정.
  - REQ-002 상태머신/도메인 → REQ-056/057/062
  - REQ-003 테스트 계약 → REQ-056/057
  - REQ-005 일일 preallocation 폐기 → REQ-058(reconcile)/REQ-060(M)
  - REQ-006 persistence 스키마 → REQ-056/062/064
  - REQ-007 admission/intent → REQ-059/061

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

docs/srs/Data/req-056_asset-permanent-slot-schema.md

@@ -1,6 +1,6 @@
 # req-056: 자산 영구 슬롯 스키마 재설계 + 마이그레이션
 
-- Status: Proposed
+- Status: Approved
 - Type: Data
 - Priority: High
 - Owner: project maintainers
@@ -62,3 +62,28 @@
 
 #### Validation Plan
 - 마이그레이션 적용 후 스키마/UNIQUE/계약 가드 + drift 테스트 green.
+
+### CHG-20260610-02
+- Date: 2026-06-10
+- Author: Justin Ko
+
+#### Change Summary
+- Status Proposed → Approved (confirm-req). 필수 필드·구체 AC 충족, source dcy-020(confirmed, handoff 승인)과 모순 없음.
+
+#### Intent
+- delivery input 으로 승격.
+
+#### Acceptance Criteria Delta
+- Added: 없음 / Updated: 없음 / Removed: 없음
+
+#### Impacted Area Delta
+- Docs: docs/srs/index.md (Register Approved) / Modules: 없음 / Tests: 없음
+
+#### Delivery Trace Delta
+- Batches: none (batch 편성 전) / Releases: none
+
+#### Revalidation Impact
+- Reverification Needed: no / Existing Implementation Invalidated: no / Status Recommendation: keep-current / Follow-up Action: suggest-batch-reqs / draft-batch.
+
+#### Validation Plan
+- 승인 후 batch planning 에서 본 REQ AC 를 검증 기준으로 사용.