feat(F-150): completed feature

work/artifacts/F-150/leader-close.json

@@ -0,0 +1,12 @@
+{
+  "feature_id": "F-150",
+  "agent": "leader",
+  "stage": "close",
+  "verdict": "APPROVED",
+  "summary": "F-150 completed: CSV export streaming endpoint GET /reporting/export/:report with REPORTING_EXPORT RBAC (admin+editor). tsc 0, boundaries 0, verify.sh green.",
+  "checks": [
+    {"item": "Gates approved", "ok": true, "evidence": "reviewer.json, security.json, qa.json -> APPROVED"},
+    {"item": "verify.sh", "ok": true, "evidence": "exit 0"}
+  ],
+  "issues": []
+}