fix: check types

Author: GefMar

taskiq/middlewares/smart_retry_middleware.py

@@ -61,6 +61,14 @@ def __init__(
         self.max_delay_exponent = max_delay_exponent
         self.schedule_source = schedule_source
 
+        if schedule_source is not None and not isinstance(
+            schedule_source,
+            ScheduleSource,
+        ):
+            raise TypeError(
+                "schedule_source must be an instance of ScheduleSource or None",
+            )
+
     def is_retry_on_error(self, message: TaskiqMessage) -> bool:
         """
         Check if retry is enabled for this task.