feat(dotnet): add parity contract and wiring

tests/unit/test_validate_dotnet_parity_contract_v1.py

@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+import json
+import subprocess
+import sys
+from pathlib import Path
+
+
+def test_validate_dotnet_parity_contract_passes() -> None:
+    root = Path(__file__).resolve().parents[2]
+    proc = subprocess.run(
+        [sys.executable, str(root / "tools" / "validate_dotnet_parity_contract_v1.py")],
+        cwd=root,
+        capture_output=True,
+        text=True,
+    )
+    assert proc.returncode == 0, proc.stdout + proc.stderr
+    payload = json.loads(proc.stdout)
+    assert payload["gate"] == "PASS"
+    assert payload["formula_id"] == "WBS_10_DOTNET_PARITY_CONTRACT_V1"
+
+
+def test_validate_dotnet_parity_contract_reports_missing_target() -> None:
+    root = Path(__file__).resolve().parents[2]
+    temp = root / "Temp" / "test_wbs_10_parity_contract_bad.yaml"
+    temp.write_text(
+        "formula_id: WBS_10_DOTNET_PARITY_CONTRACT_V1\ngoal: Python reference와 .NET domain 결과를 데이터 기반 parity 계약으로 고정한다.\ntargets: []\n",
+        encoding="utf-8",
+    )
+    proc = subprocess.run(
+        [sys.executable, str(root / "tools" / "validate_dotnet_parity_contract_v1.py"), "--contract", str(temp)],
+        cwd=root,
+        capture_output=True,
+        text=True,
+    )
+    assert proc.returncode != 0
+    payload = json.loads(proc.stdout)
+    assert payload["gate"] == "FAIL"
+    assert "formula_engine_timing missing" in payload["missing"]