initial implementation of note attachments

src/becca/entities/bbranch.js

@@ -198,6 +198,10 @@ class BBranch extends AbstractBeccaEntity {
                 relation.markAsDeleted(deleteId);
             }
 
+            for (const noteAttachment of note.getNoteAttachments()) {
+                noteAttachment.markAsDeleted(deleteId);
+            }
+
             note.markAsDeleted(deleteId);
 
             return true;