else this won't be conform to the SEDA 0.2schema. But notice this is the
opposite in SEDA 1.0. In this case, test cases were fine but the problem was
actually the same: data-objects and sub-units order was random, and it's not
anymore.

As we are here, add eid so we get a total ordering, which is an expected
property so that exported profiles are consistent during time. This should be
enough until we want to control ordering from the UI.

Closes extranet #33070904