Update models and learning state after May 16 draw

- Run learning for 2026-05-16 draw (7 11 20 23 27 30 SZ:9)
- Retrain LSTM on updated 3126-draw dataset
- Update generation history with new tips

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

data/learning_log.json

@@ -588,6 +588,19 @@
         "main": 0.0
       },
       "note": "retroactive_learning"
+    },
+    {
+      "timestamp": "2026-05-19T13:38:48.024370",
+      "draw_date": "2026-05-16",
+      "evaluation": {
+        "main": 2,
+        "sz": false,
+        "tip": 7
+      },
+      "avg_matches": {
+        "main": 0.9,
+        "sz_rate": 0.0
+      }
     }
   ]
 }