Changed reported_at to a date and included audit columns.

app/dao/returned_letters_dao.py

@@ -23,19 +23,21 @@ def _get_notification_ids_for_references(references):
 @transactional
 def insert_or_update_returned_letters(references):
     data = _get_notification_ids_for_references(references)
-    now = datetime.utcnow()
     for row in data:
         table = ReturnedLetter.__table__
 
         stmt = insert(table).values(
-            reported_at=now,
+            reported_at=datetime.utcnow().date(),
             service_id=row.service_id,
-            notification_id=row.id)
+            notification_id=row.id,
+            created_at=datetime.utcnow()
+        )
 
         stmt = stmt.on_conflict_do_update(
             index_elements=[table.c.notification_id],
             set_={
-                'reported_at': now,
+                'reported_at': datetime.utcnow().date(),
+                'updated_at': datetime.utcnow()
             }
         )
         db.session.connection().execute(stmt)