feat(reconcile): safely seed canonical cost basis

docs/srs/index.md

@@ -74,7 +74,7 @@
 
 ## Next Requirement ID
 
-- Current: `REQ-123`
+- Current: `REQ-124`
 - Rule: `Requirement Register`에 있는 가장 큰 REQ 번호보다 정확히 1 커야 한다.
 
 ## Requirement Register
@@ -203,9 +203,12 @@
 | REQ-120 | KIS balance 인증 실패 fail-loud 및 broker/token lifecycle 정책 | Exception | Implemented | High | trex-core-dev | [req-120](./Exception/req-120_kis-balance-auth-failure-fail-loud-lifecycle-policy.md) |
 | REQ-121 | managed non-holding divergence 분류와 slot 존재 조회 계약 | Data | Implemented | High | trex-core-dev | [req-121](./Data/req-121_managed-non-holding-divergence-classification-query.md) |
 | REQ-122 | operator broker truth hotfix baseline 문서 정합 | Documentation | Implemented | High | trex-core-dev | [req-122](./Documentation/req-122_operator-broker-truth-hotfix-baseline-alignment.md) |
+| REQ-123 | cost-basis canonical parse 및 WAC unavailable 안전 sync seed | Integration | Approved | High | trex-core-dev | [req-123](./Integration/req-123_cost-basis-canonical-parse-and-safe-sync-seeding.md) |
 
 ## Recent Change Log Summary
 
+- 2026-07-16 :: REQ-123 **confirm-req 승인(Approved, lead confirm)**: dcy-038 OQ-1~3 완료 기준으로 제약(scope 제외 항목: API/schema 변경/credential/config 변경/live sync/배포), OQ-2/OQ-3 결정 반영, fail-closed WAC unavail no-write 정책, canonical parsing 우선순위/legacy fallback 규칙 및 dry-run diagnostics가 일치함을 확인해 `REQ-123`을 Approved 전환.
+- 2026-07-16 :: REQ-123 **신규 생성(Proposed, draft-req, dcy-038)**: portfolio-hub canonical `cost_basis_per_unit` consumer parse, legacy alias precedence, WAC unavailable fail-closed sync/no-write, dry-run diagnostics, response-contract/regression tests, observability 및 rollback/release gate. portfolio-hub API/schema/auth·token/config·DB migration/direct edit·live sync·배포 제외.
 - 2026-07-15 :: REQ-119~122 **`Approved` → `Implemented`** (`confirm-req-implemented`, dcy-037/BAT-057): PR #42 merged to `main` (94e1489). Independent QC PASS-WITH-NOTES (acceptance blocker 0); 806 passed/47 skipped/1 deselected. `sync --live`, deployment, and production remediation remain separate release-approval work.
 - 2026-07-14 :: REQ-119~122 **승인(Approved, confirm-req, dcy-037)**: lead 검토로 각 REQ의 owner·priority·scope·검증 가능 AC와 Notes의 non-blocking 설계 제약을 확인했다. #39/#40/#41은 다음 `suggest-batch-reqs`에서 단일 emergency batch 후보이며, `sync --live`는 여전히 별도 release approval gate다.
 - 2026-07-14 :: REQ-119~122 **신규 생성(Proposed, draft-req, dcy-037)**: #39 fetched credential daemon/operator broker truth parity, #40 token/auth fail-loud empty-balance 분리, #41 managed non-holding divergence classification, runtime/interface/operations baseline 정합. #39/#40/#41 단일 emergency batch 및 `sync --live` 별도 release approval gate를 유지한다.