Add DeltaStore exchange v1 support

app.js

@@ -198,11 +198,22 @@ async function loadBenchmark() {
 
 function downloadReport() {
   if (!state.scanReport) return;
-  const blob = new Blob([JSON.stringify(state.scanReport, null, 2)], { type: "application/json" });
+  const isDeltaStore = state.scanFormat === "DeltaStore Trace Exchange v1";
+  const payload = isDeltaStore ? {
+    trace_id: state.scanReport.session.id,
+    taxonomy_version: "agent-failure-atlas/v1",
+    findings: state.scanReport.findings.map((finding) => ({
+      finding_id: finding.id, trace_id: state.scanReport.session.id, taxonomy_version: finding.taxonomy_version ?? "agent-failure-atlas/v1",
+      rule_id: finding.rule_id ?? finding.detector, category: finding.category, severity: finding.severity,
+      evidence_event_ids: finding.evidence_event_ids ?? [], branch_id: finding.branch_id ?? null,
+      checkpoint_id: finding.checkpoint_id ?? null, message: finding.description, detector_metadata: { detector: finding.detector },
+    })),
+  } : state.scanReport;
+  const blob = new Blob([JSON.stringify(payload, null, 2)], { type: "application/json" });
   const url = URL.createObjectURL(blob);
   const link = document.createElement("a");
   link.href = url;
-  link.download = `${state.scanReport.session.id}.atlas-report.json`;
+  link.download = `${state.scanReport.session.id}.${isDeltaStore ? "atlas-findings" : "atlas-report"}.json`;
   link.click();
   URL.revokeObjectURL(url);
 }