I'm filing this to record the idea from tadamski@redhat.com at
https://github.com/wildfly/wildfly/pull/17866#discussion_r1638790336 re a potential addition of an allowed value for the 'transaction-isolation' attribute in a datasource resource.

Maybe it would also make sense to add a TransactionIsolation.SNAPSHOT (with comment that is SQLServer thing)

By filing this I'm not advocating for or against this; I just want to merge the PR and don't want this aspect to fall into a crack in case it's wanted.