Fix category filter query builder

[stefanwimmer128]

New Pull Request checklist

PR Type

What kind of change does this PR introduce?

• [ ] [FEATURE] - A new feature
• [x] [BUGFIX] - A bug fix
• [ ] [TASK] - Any task, which is not a new feature or bugfix
• [ ] [TEST] - Adding missing tests
• [ ] [DOC] - Documentation only changes
• [ ] [WIP] - Work in progress tag, should not be present when creating pull requests

Breaking change

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No

Description

Fixes query builder for category filtering. Currently the invalid column "tpppm.uid_local" is used in "group by" where "scrm.uid_foreign" should be used.