Add diagnosis eval harness

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

@@ -0,0 +1,27 @@
+package com.superbiz.agent.eval;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+import java.util.Map;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class DiagnosisEvalResult {
+
+    private String caseId;
+    private String title;
+    private boolean passed;
+    private List<String> failedChecks;
+    private String verdict;
+    private int matchedKeywordCount;
+    private int requiredKeywordCount;
+    private Map<String, Boolean> evidenceCoverage;
+    private Integer toolCallCount;
+    private Integer durationMs;
+}