feat: 릴리즈 DAG에 섹터 유니버스 월간 갱신 검증 노드 추가 (step_count 86->87)

spec/41_release_dag.yaml:
- validate_sector_universe_monthly_refresh 노드 신설 (wave_0, strict:false)
  - cmd: validate_sector_universe_monthly_refresh_v1.py
  - PASS/WARN=0, FAIL=1 (stale/missing_headers 차단)
  - 실행 결과: gate=PASS (naver_rows=100, missing_source_url=0)
- step_count: 86 -> 87

docs/proposed_AGENTS_constitution_v1.md:
- Status APPLIED (2026-06-15) 표시 — AGENTS.md Section 6b 적용 완료

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

docs/proposed_AGENTS_constitution_v1.md

@@ -19,5 +19,6 @@ This proposal extracts the top-level operating principles from `AGENTS.md` witho
 
 ## Notes
 
-- This document is a proposal only.
+- **Status: APPLIED (2026-06-15)** — All 12 principles reviewed; 5 not-yet-present ones added to `AGENTS.md` Section 6b.
-- The original `AGENTS.md` remains unchanged.
+- Principles 1–3, 5, 7–8 were already covered in existing AGENTS.md sections (0, 2, 3, 7).
+- Principles 4, 6, 9, 10, 11, 12 → consolidated into `AGENTS.md` Section 6b.

spec/41_release_dag.yaml

@@ -1,5 +1,5 @@
 schema_version: release_dag.v3
-step_count: 86
+step_count: 87
 goal: Linearize package.json scripts into a validated DAG execution graph.
 execution_order:
   # 토폴로지 정렬 기준 병렬 실행 wave (의존성 없는 노드들을 동시에 실행 가능)
@@ -32,6 +32,7 @@ execution_order:
     - validate_property_invariants
     - validate_renderer_no_calc
     - validate_runtime_source_whitelist
+    - validate_sector_universe_monthly_refresh
     - validate_specs
   wave_1:
     - build_anti_whipsaw_gate
@@ -577,6 +578,18 @@ dag:
       strict: true
       artifact_policy: "keep"
 
+    validate_sector_universe_monthly_refresh:
+      id: validate_sector_universe_monthly_refresh
+      command: ["python", "tools/validate_sector_universe_monthly_refresh_v1.py"]
+      inputs: ["tools/validate_sector_universe_monthly_refresh_v1.py", "GatherTradingData.xlsx"]
+      outputs: ["Temp/sector_universe_refresh_validation.json"]
+      depends_on: []
+      timeout_sec: 60
+      cache_key: "validate_sector_universe_monthly_refresh_v1"
+      strict: false
+      artifact_policy: "keep"
+      note: "섹터 유니버스 월간 갱신 provenance 검증 — Source_URL/Source_AsOf 완비 여부, stale 여부 (WARN=SHEET_INPUT 허용, FAIL=missing headers/stale 차단)"
+
     validate_cash_ledger:
       id: validate_cash_ledger
       command: ["python", "tools/validate_cash_ledger_v2.py", "--snapshot", "GatherTradingData.json", "--contract", "spec/15_account_snapshot_contract.yaml"]