Add final pipeline verification report

manifests/final_verification.json

@@ -0,0 +1,8 @@
+{
+  "created_utc": "2026-08-02T05:40:39.665996+00:00",
+  "months_complete": 60,
+  "months_expected": 60,
+  "missing_required_outputs": [],
+  "all_months_complete": true,
+  "pipeline_complete": true
+}