Revert changes to super.__init__()

Attempting to assign values to the attributes directly resulted in write errors.

Author: chalmerlowe

packages/db-dtypes/db_dtypes/core.py

@@ -65,12 +65,12 @@ def __init__(self, values, dtype=None, copy: bool = False):
         elif copy:
             values = values.copy()
 
-        # 1. Assign the internal attributes required by NDArrayBackedExtensionArray
-        self._ndarray = values
-        self._dtype = values.dtype
+        # We must pass values and dtype to the base constructor. 
+        # Manual assignment (self._ndarray = values) will fail at runtime with 
+        # AttributeError because the base is a Cython-backed 'NDArrayBacked' 
+        # object with non-writable attributes.
+        super().__init__(values=values, dtype=values.dtype)  # type: ignore[call-arg]
 
-        # 2. Call super() without arguments to initialize PandasObject/ExtensionArray
-        super().__init__()
 
     @classmethod
     def __ndarray(cls, scalars):