Return from scalar constants in get_unique_constant_value

Author: ricardoV94

pytensor/tensor/variable.py

@@ -1051,6 +1051,9 @@ def get_unique_constant_value(x: TensorVariable) -> Number | None:
                 if (flat_data == flat_data[0]).all():
                     return flat_data[0]
 
+        else:
+            return data
+
     return None