feat(eval): add executor audit closure checks

mvp/eval/cases/diagnosis-cases.json

@@ -53,5 +53,56 @@
     "requiredEvidenceTools": ["query_metrics", "query_logs"],
     "allowedVerdicts": ["LOW_CONFID", "PASS"],
     "forbiddenAnswerKeywords": ["可以忽略"]
+  },
+  {
+    "id": "gatekeeper-fabricated-invocation",
+    "title": "Gatekeeper fabricated invocation",
+    "question": "支付失败是否能确认由日志中的连接池耗尽导致？",
+    "traceFixture": "gatekeeper-fabricated-invocation-reject.json",
+    "expectedRootCauseKeywords": ["证据", "引用", "失败"],
+    "minKeywordMatches": 2,
+    "requiredEvidenceTools": ["query_logs"],
+    "allowedVerdicts": ["REJECT", "LOW_CONFID"],
+    "forbiddenAnswerKeywords": ["已经完全确认"],
+    "requireV2AuditClosure": true,
+    "requireClaimChecks": true,
+    "requireComposerOutput": true,
+    "expectedGatekeeperStatuses": ["fail"],
+    "expectedComposerStatuses": ["valid"],
+    "forbiddenConfirmedClaimKeywords": ["连接池耗尽导致支付失败"]
+  },
+  {
+    "id": "unsupported-claim-filtering",
+    "title": "Unsupported claim filtering",
+    "question": "订单超时是否可以确认由数据库主库故障导致？",
+    "traceFixture": "unsupported-claim-filtering-low-confid.json",
+    "expectedRootCauseKeywords": ["超时", "证据"],
+    "minKeywordMatches": 2,
+    "requiredEvidenceTools": ["query_logs"],
+    "allowedVerdicts": ["LOW_CONFID"],
+    "forbiddenAnswerKeywords": ["已经确认"],
+    "requireV2AuditClosure": true,
+    "requireClaimChecks": true,
+    "requireComposerOutput": true,
+    "expectedGatekeeperStatuses": ["pass"],
+    "expectedComposerStatuses": ["valid"],
+    "forbiddenConfirmedClaimKeywords": ["主库故障"]
+  },
+  {
+    "id": "composer-fallback-no-raw-json",
+    "title": "Composer fallback no raw JSON",
+    "question": "库存服务慢响应是否可以直接输出 Executor JSON？",
+    "traceFixture": "composer-fallback-no-raw-json-low-confid.json",
+    "expectedRootCauseKeywords": ["慢响应", "证据"],
+    "minKeywordMatches": 2,
+    "requiredEvidenceTools": ["query_metrics"],
+    "allowedVerdicts": ["LOW_CONFID"],
+    "forbiddenAnswerKeywords": ["executor_evidence_v2", "answer_version", "claim_id"],
+    "requireV2AuditClosure": true,
+    "requireClaimChecks": true,
+    "requireComposerOutput": true,
+    "expectedGatekeeperStatuses": ["pass"],
+    "expectedComposerStatuses": ["composer_malformed"],
+    "forbiddenConfirmedClaimKeywords": ["线程池已经耗尽"]
   }
 ]