Add some slack notifications and a todo to fix the rest

app/TransactionRules/Actions/MoveDescriptionToNotes.php

@@ -57,6 +57,7 @@ class MoveDescriptionToNotes implements ActionInterface
         $object = TransactionJournal::where('user_id', $journal['user_id'])->find($journal['transaction_journal_id']);
         if (null === $object) {
             Log::error(sprintf('No journal #%d belongs to user #%d.', $journal['transaction_journal_id'], $journal['user_id']));
+            // TODO introduce error
             return false;
         }
         $note = $object->notes()->first();