docs: update docstring for load_filtered_policy to clarify usage

Author: BryanttV

openedx_authz/engine/adapter.py

@@ -100,11 +100,15 @@ def load_filtered_policy(self, model: Model, filter: Filter) -> None:  # pylint:
         filter to load only relevant rules. The filtered rules are then loaded
         into the provided Casbin model.
 
+        IMPORTANT: This method is used internally by the `enforcer.load_filtered_policy()` method.
+            Do not call this method directly. If you need to load policy rules, use the
+            `enforcer.load_filtered_policy()` method.
+
         Args:
             model (Model): The Casbin model to load policy rules into.
             filter (Filter): Filter object containing criteria for policy selection.
-                   Should have attributes like ptype, v0, v1, etc. with lists
-                   of values to filter by.
+                Should have attributes like ptype, v0, v1, etc. with lists
+                of values to filter by.
         """
         queryset = CasbinRule.objects.using(self.db_alias)
         filtered_queryset = self.filter_query(queryset, filter)