We automatically clean up \r in annotations now, but a lot of old annotations still contain it. This means that, at least for releases, they get automatically cleaned up when users are doing something else to the releases in question, creating confusing edits like https://musicbrainz.org/edit/87994751

We should probably run the equivalent of trim_multiline_text once on all our existing annotations (we seem to have over 100k still containing \r) to avoid this problem in the future.