Add diagnosis eval harness

src/main/java/com/superbiz/agent/eval/DiagnosisEvalCase.java

@@ -0,0 +1,25 @@
+package com.superbiz.agent.eval;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class DiagnosisEvalCase {
+
+    private String id;
+    private String title;
+    private String question;
+    private String traceFixture;
+    private List<String> expectedRootCauseKeywords;
+    private Integer minKeywordMatches;
+    private List<String> requiredEvidenceTools;
+    private List<String> allowedVerdicts;
+    private List<String> forbiddenAnswerKeywords;
+}