feat: REQ-001~018 Implemented 전환, REQ-010 GET /v1/assets admin catalog 재정의, REL-001 draft

- confirm-req-implemented: REQ-001~018 (17건, REQ-013 제외) Approved → Implemented
  - BAT-001(REQ-009/011/014), BAT-002(REQ-010/012/015), BAT-003(REQ-001/002/003/006)
  - BAT-004(REQ-004/005), BAT-005(REQ-007/008), BAT-006(REQ-016/017/018)
  - CHG-20260521-01 entry 각 REQ에 추가; SRS index Recent Change Log 갱신

- REQ-010 CHG-20260521-02: GET /v1/assets admin catalog 전용 재정의
  - 기존 token_type 분기 portfolio 조회 코드 제거, admin permission + list_assets() 호출로 대체
  - AssetCatalogListResponse 스키마 추가 (items/total)
  - REQ-010 Status: Implemented → Approved (재검증 필요)
  - 테스트 343건 전체 통과: service/user token 403, admin token 200 + catalog schema 검증

- migration 보강: portfolios_asset_migration market 컬럼 부재 fallback,
  portfolio_tags 빈 테이블 early-return, service_token index fix autocommit_block 정리

- docs/releases/rel-001: REL-001 draft 추가 (BAT-001~011 포함)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/srs/Data/req-009_assets-table-schema.md

@@ -1,6 +1,6 @@
 # REQ-009: assets 테이블 스키마 도입
 
-- Status: Approved
+- Status: Implemented
 - Type: Data
 - Priority: High
 - Owner: Justin Ko
@@ -43,6 +43,34 @@
 
 ## Change Log
 
+### CHG-20260521-01
+- Date: 2026-05-21
+- Author: Justin Ko
+
+#### Change Summary
+- Status: Approved → Implemented
+
+#### Intent
+- BAT-001 confirm-batch-verification 완료. assets 테이블 스키마·GIN 인덱스·MarketCode Enum 검증 통과. DB-integration ACs는 실 DB 의존 — CI에서 migration 파일 구조 검증으로 대체, release 배포 시 최종 확인 예정.
+
+#### Acceptance Criteria Delta
+- No change
+
+#### Impacted Area Delta
+- No change
+
+#### Delivery Trace Delta
+- Batches:
+  - BAT-001
+- Releases:
+  - REL-001
+
+#### Revalidation Impact
+- Reverification Needed: no
+- Existing Implementation Invalidated: no
+- Status Recommendation: implemented
+- Follow-up Action: REL-001 배포 시 alembic upgrade 결과로 DB-integration AC 최종 확인
+
 ### CHG-20260519-02
 - Date: 2026-05-19
 - Author: Justin Ko