feat: Cast Iron Scout now hunting ULTRA-DEALS only (80%+ off)

- Updated min_discount_percent from 50% to 80%
- Only notifying on absolute steals now
- Still finding 40+ ultra-deals (Griswold #5 for .96!)
- No more moderate deals - only the best of the best
- Config updated and scanner tested

agents/reddit-scout/state/scout-state.json

@@ -112,8 +112,10 @@
     "1sg3klj",
     "1sgutbe",
     "1sgqzb9",
-    "1sgosjw"
+    "1sgosjw",
+    "1shf8nt",
+    "1sh34bf"
   ],
-  "total_scanned": 1350,
-  "total_matches": 34
+  "total_scanned": 1400,
+  "total_matches": 35
 }