feat(dotnet): add domain parity backlog harness

docs/ROADMAP_WBS.md

@@ -1474,6 +1474,7 @@ WBS-8.8 (KIS 리팩터) — 독립적 (원격 병행)
 > normalization contract: [WBS_10_DOTNET_NORMALIZATION_CONTRACT.yaml](./WBS_10_DOTNET_NORMALIZATION_CONTRACT.yaml)
 > idempotency contract: [WBS_10_DOTNET_IDEMPOTENCY_CONTRACT.yaml](./WBS_10_DOTNET_IDEMPOTENCY_CONTRACT.yaml)
 > ci/cd chain contract: [WBS_10_DOTNET_CICD_CHAIN_CONTRACT.yaml](./WBS_10_DOTNET_CICD_CHAIN_CONTRACT.yaml)
+> domain parity backlog: [WBS_10_DOTNET_DOMAIN_PARITY_BACKLOG.yaml](./WBS_10_DOTNET_DOMAIN_PARITY_BACKLOG.yaml)
 
 > 현황 진단(2026-06-26): .NET 프로젝트는 Python 엔진(41 모듈, 14,500 LOC) 대비 5~10%(~1,400 LOC) 수준.
 > Domain 계산기 6개·데이터 모델 8개·KIS/Naver/Yahoo 클라이언트·PostgreSQL 마이그레이션·Razor Pages 어드민 대시보드 기본 구현 완료.

docs/WBS_10_DOTNET_DOMAIN_PARITY_BACKLOG.yaml

@@ -0,0 +1,50 @@
+formula_id: WBS_10_DOTNET_DOMAIN_PARITY_BACKLOG_V1
+owner: QuantEngine
+status: draft
+goal: "핵심 계산기 parity 대상과 우선순위를 고정한다."
+
+coverage_min: 1.0
+tolerance_policy:
+  numeric_default: 0
+  text_default: exact
+  factor_calculator_numeric: 0.000001
+  exit_stop_price_numeric: 0.0001
+
+parity_targets:
+  - target_id: formula_engine_timing
+    source: src/dotnet/QuantEngine.Core/Domain/FormulaEngine.cs
+    priority: 1
+    reason: "timing decision은 downstream routing의 선행 게이트"
+  - target_id: formula_engine_sell
+    source: src/dotnet/QuantEngine.Core/Domain/FormulaEngine.cs
+    priority: 2
+    reason: "sell ratio/action은 실행 표 생성의 핵심"
+  - target_id: formula_engine_final
+    source: src/dotnet/QuantEngine.Core/Domain/FormulaEngine.cs
+    priority: 3
+    reason: "final decision은 보고/배포의 최종 산출"
+  - target_id: exit_stop_price
+    source: src/dotnet/QuantEngine.Core/Domain/ExitDecisions.cs
+    priority: 4
+    reason: "손절가 절대값 일치가 필요"
+  - target_id: exit_stop_ladder
+    source: src/dotnet/QuantEngine.Core/Domain/ExitDecisions.cs
+    priority: 5
+    reason: "워터폴 선형 처리 검증"
+  - target_id: exit_heat_thresholds
+    source: src/dotnet/QuantEngine.Core/Domain/ExitDecisions.cs
+    priority: 6
+    reason: "동적 열감 임계값 일치"
+  - target_id: factor_calculator
+    source: src/dotnet/QuantEngine.Core/Domain/FactorCalculator.cs
+    priority: 7
+    reason: "정규화된 입력 순서에서 deterministic output 보장"
+
+coverage_rule:
+  - "priority 1..7 모두 존재해야 한다"
+  - "tolerance_policy는 숫자/텍스트 기본값을 정의해야 한다"
+  - "새 parity target은 reference fixture와 함께만 추가한다"
+
+notes:
+  - "parity는 기능 추가가 아니라 회귀 차단 장치다."
+  - "수치 재계산은 reference fixture 외에서 하지 않는다."