This makes it easy to list entries with specific ids, which comes in
handy when clients want to fetch multiple known objects at once.

new program endpoint

See merge request !52

feat: exclude internal_not, owner_ids and created & updated fields from show serializer for calendar

This reverts commit 072a351f.

This reverts commit d1681848.

This reverts commit 8d32fab1.

This reverts commit 906b8420.

Merge branch 'kmohrf/program-endpoint' of ssh://gitlab.servus.at:22022/aura/steering into kmohrf/program-endpoint