update events

enrollments-events/app/events/schedule_reminders.py

@@ -27,6 +27,8 @@ def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
     enrollment_id = new_image['id']
     user = new_image['user']
     course_name = glom(new_image, 'course.name')
+    # Post-migration: after removing the stopgap file `patch_course_metadata.py`,
+    # use `access_expires_at` from `new_image`
     access_period = int(
         dyn.collection.get_item(
             KeyPair(
@@ -49,20 +51,16 @@ def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
             },
         )
 
-        # By default, the enrollment will expire when the access period ends
-        # (scheduled below).
-
-        # If the enrollment is completed earlier (e.g., certificate issued),
-        # the expiration schedule is canceled and an archive schedule
-        # (`SCHEDULE#SET_AS_ARCHIVED`) is created instead.
+        # Schedule the event to add `access_expired` after the access period ends
         transact.put(
             item={
                 'id': enrollment_id,
-                'sk': 'SCHEDULE#SET_AS_EXPIRED',
+                'sk': 'SCHEDULE#SET_ACCESS_EXPIRED',
                 'created_at': now_,
                 'ttl': ttl(start_dt=now_, days=access_period),
             },
         )
+
         transact.put(
             item={
                 'id': enrollment_id,