api: change precision of ChangesetStatus.modified_at to seconds Per default MySQL only uses seconds. So in order to be consistent on all databases, this is the easiest solution. I don't think the microseconds are necessary. And AFAICS mercurial only uses seconds for the changeset modification time as well. So why should we use microseconds for ChangesetStatus. Without this, for example test_api_get_changeset_with_reviews fails, because of datetime mismatch if MySQL is used.