Handle updates (vs. historized and new versions) separately. We need this distinction as updated data currently can not be reviewed. More precisely: it can not be declined after review, as the old data is updated in place. The current exclusion from the review is a workaround and not meant to be the final solution. Note that there are additional minor problems, like the fact that the updated data is not counted as changed data for the import.

The gemma database schema requires PostgreSQL >= 11.

`dot.tmpl` is a template file for `postgresql_autodoc`
to be more similiar to UML and leave out some less useful labels.

See  `../docker/README.md`