Stabilize source health monitoring

08-threat-intel/generated/dashboard/summary.json

@@ -1,5 +1,5 @@
 {
-  "generated_at": "2026-03-19T02:23:04+00:00",
+  "generated_at": "2026-03-19T02:27:20+00:00",
   "advisory_count": 2392,
   "run_count": 140,
   "statuses": {
@@ -158,7 +158,7 @@
     "green_source_count": 118,
     "source_failure_count": 0,
     "open_alert_count": 0,
-    "last_fully_green_run": "2026-03-19T02:22:24+00:00"
+    "last_fully_green_run": "2026-03-19T02:27:12+00:00"
   },
   "systems": [
     {