Resolve "Extra marks and custom excuses (potentially) counted multiple times"

Closes #142 (closed)

added part::backend prio::1 type::bug workflow::confirmed labels

assigned to @nik and unassigned @hansegucker

marked this merge request as ready

added 1 commit

• 9dd38abe - Add missing distinct to extra mark and custom excuse aggregations

Compare with previous version

merged

mentioned in commit 4628598d