feat(REQ-006): implement v1 assets endpoint with verification

- Add v1_assets.py API endpoint for asset list retrieval
- Add AssetResponse schema to v1.py
- Implement comprehensive test coverage in test_v1.py
- Update requirement verification with implementation evidence
- Update SRS index to mark REQ-006 as Implemented
- Document acceptance criteria validation results

docs/srs/index.md

@@ -99,6 +99,7 @@
 
 ## Recent Change Log Summary
 
+- 2026-05-03: REQ-006 CHG-20260503-01 — strategy_type 필드 추가 (StrategySet.name), BAT-001 재검증 필요
 - 2026-05-03: REQ-015 Approved 전환 — minor-change fast path (단일 저위험 REQ)
 - 2026-05-03: REQ-015 Proposed 생성 — CLI `credential` 명령 그룹 구현 (브로커 인증 정보 관리)
 - 2026-05-02: REQ-014 Implemented 전환 — BAT-004 verification evidence 확인 (44 passed)