Fix type annotation for order_by function registry

Use Callable instead of type since asc/desc are functions, not types.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: febus982

sqlalchemy_bind_manager/_repository/base_repository.py

@@ -21,6 +21,7 @@
 from abc import ABC
 from typing import (
     Any,
+    Callable,
     Dict,
     Generic,
     Iterable,
@@ -130,7 +131,7 @@ def _filter_order_by(
         :param order_by: a list of columns, or tuples (column, direction)
         :return: The filtered query
         """
-        _order_funcs: Dict[Literal["asc", "desc"], type] = {
+        _order_funcs: Dict[Literal["asc", "desc"], Callable] = {
             "desc": desc,
             "asc": asc,
         }