sort website entities by stable publication date in typesense

[babslgam]

Is your feature request related to a problem? Please describe.

check if currently updatedAt is used which would cause different sort order

Describe the solution you'd like

see above

Describe alternatives you've considered

No response

Additional context

No response

[stefanprobst]

this is what we currently have

type	DB column
country	members_and_partners.updated_at
document-or-policy	documents_policies.updated_at
event	events.duration.start
funding-call	funding_calls.updated_at
impact-case-study	impact_case_studies.publication_date
institution	organisational_units.updated_at
national-consortium	organisational_units.updated_at
news-item	news.publication_date
opportunity	opportunities.updated_at
page	pages.publication_date
person	persons.updated_at
project	dariah_projects.updated_at
spotlight-article	spotlight_articles.publication_date
working-group	working_groups.updated_at