Fix __init__ to call original CrossEncoder initialization

The previous implementation was completely overriding CrossEncoder's
__init__ method, preventing proper base class initialization. Now we
call the original __init__ first before loading our custom model.

modeling_zeranker.py

@@ -108,7 +108,14 @@ def load_model(
     return tokenizer, model
 
 
+# Store the original __init__ method
+_original_init = _CE.__init__
+
+
 def __init__(self, *args: Any, **kwargs: Any) -> None:
+    # Call the original CrossEncoder __init__ first
+    _original_init(self, *args, **kwargs)
+
     # Load the model immediately on instantiation
     self.inner_tokenizer, self.inner_model = load_model(global_device)
     self.inner_model.eval()