[RUCSS] Fix modified column not being updated in some cases

[wordpressfan]

Description

We found a bug in the columns definitions for RUCSS database table that prevents BerlinDB from identifying the modified column to be updated with any update in the table.

Fixes #6229

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue).

Is the solution different from the one proposed during the grooming?

As groomed

Checklists

Generic development checklist

• My code follows the style guidelines of this project, with adapted comments and without new warnings.
• I have added unit and integration tests that prove my fix is effective or that my feature works.
• The CI passes locally with my changes (including unit tests, integration tests, linter).
• Any dependent changes have been merged and published in downstream modules.
• If applicable, I have made corresponding changes to the documentation. Provide a link to the documentation.

Test summary

• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I validated all Acceptance Criteria of the related issues. (If applicable, provide proof).
• I validated all test plan the QA Review asked me to.

[mostafa-hisham]

looks good

[vmanthos]

Working as expected! 👍