add event

order-events/app/events/stopgap/patch_items.py

@@ -55,12 +55,7 @@ def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
     return True
 
 
-class CourseNotFoundError(Exception):
-    def __init__(self, *args):
-        super().__init__('Course not found')
-
-
-def _get_course(course_id: str) -> dict:
+def _get_course(course_id: str) -> dict | None:
     with sqlite3.connect(
         database=SQLITE_DATABASE, detect_types=sqlite3.PARSE_DECLTYPES
     ) as conn:
@@ -70,4 +65,4 @@ def _get_course(course_id: str) -> dict:
         for row in rows:
             return row['json']
 
-    raise CourseNotFoundError
+    return None