[auto] Update SAMBA models and signals

models/meta_optionA.json

@@ -1,13 +1,13 @@
 {
   "option": "A",
-  "trained_at": "2026-05-14T15:17:46.178760",
-  "elapsed_sec": 1052.6,
-  "winning_loss": "evar",
-  "test_ann_return": 0.1393,
-  "test_ann_vol": 0.1391,
-  "test_sharpe": 1.0018,
-  "test_max_dd": -0.0838,
-  "test_hit_rate": 0.5445,
+  "trained_at": "2026-05-15T01:36:11.703700",
+  "elapsed_sec": 766.0,
+  "winning_loss": "sharpe",
+  "test_ann_return": 0.0953,
+  "test_ann_vol": 0.0765,
+  "test_sharpe": 1.2451,
+  "test_max_dd": -0.072,
+  "test_hit_rate": 0.557,
   "test_start": "2023-08-23",
   "n_params": 66280,
   "n_assets": 8,
@@ -37,20 +37,20 @@
   "all_results": {
     "sharpe": {
       "loss_fn": "sharpe",
-      "test_ann_ret": 0.0968,
-      "test_sharpe": 1.0604,
-      "test_ann_vol": 0.0913,
-      "test_max_dd": -0.0827,
-      "test_hit_rate": 0.527,
+      "test_ann_ret": 0.0953,
+      "test_sharpe": 1.2451,
+      "test_ann_vol": 0.0765,
+      "test_max_dd": -0.072,
+      "test_hit_rate": 0.557,
       "n_params": 66280
     },
     "evar": {
       "loss_fn": "evar",
-      "test_ann_ret": 0.1393,
-      "test_sharpe": 1.0018,
-      "test_ann_vol": 0.1391,
-      "test_max_dd": -0.0838,
-      "test_hit_rate": 0.5445,
+      "test_ann_ret": 0.0721,
+      "test_sharpe": 0.4625,
+      "test_ann_vol": 0.1559,
+      "test_max_dd": -0.195,
+      "test_hit_rate": 0.5292,
       "n_params": 66280
     }
   }