[BUGFIX] Wrong DB column type results in full table scan

The tx_terfe2_domain_model_version.author column type should be changed
to ``int``. Altough the TCA uses the type ``inline``, the model only
stores one author in the field.

Resolves: #57557
Change-Id: Ide5ecb5540e7972e6c548ff6a95addd366c98586
Reviewed-on: https://review.typo3.org/29074
Reviewed-by: Tomas Norre Mikkelsen
Tested-by: Tomas Norre Mikkelsen
Reviewed-by: Thomas Loeffler
Tested-by: Thomas Loeffler