add tests to canceled enrollment or scheduled with seat

enrollments-events/app/events/enroll_scheduled.py

@@ -1,4 +1,5 @@
 from datetime import datetime
+from uuid import uuid4
 
 from aws_lambda_powertools import Logger
 from aws_lambda_powertools.utilities.data_classes import (
@@ -37,8 +38,9 @@ def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
     offset_days = old_image.get('dedup_window_offset_days')
     billing_day = old_image.get('subscription_billing_day')
     created_by = old_image.get('created_by')
-    seat: Seat | None = old_image.get('seat')
+    seat: Seat = old_image.get('seat', {})
     enrollment = Enrollment(
+        id=old_image['enrollment_id'],
         course=old_image['course'],
         user=old_image['user'],
     )