Add dropout parameter to ProjConfig for improved model regularization

code/train_production.py

@@ -62,6 +62,7 @@ class ProjConfig:
     lm_dim: int = 1024
     hidden_mult: int = 2
     num_layers: int = 2
+    dropout: float = 0.0
 
 # ============================================================
 # 2. Vision xLSTM Implementation