ols4

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Describe the bug When this endpoint is used for the search: https://www.ebi.ac.uk/ols4/api/search?q=data&start=0&groupField=iri&rows=10 There is no facet count data (it only has the search results)

To Reproduce call https://www.ebi.ac.uk/ols4/api/search?q=data&start=0&groupField=iri&rows=10

Expected behavior facet data needs to be included in the response

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Additional context It should respond like v2 API: https://www.ebi.ac.uk/ols4/api/v2/entities?search=data&size=10&page=0&facetFields=ontologyId where the facetFieldsToCount field contains facet data.

I tried also to include facetFields param, but no luck: https://www.ebi.ac.uk/ols4/api/search?q=data&start=0&groupField=iri&rows=10&facetFields=ontologyId

Just to note this needs to be compared with OLS3 as we don't want to make breaking changes to the backwards compatible API.

We are also interested in getting the facet data (facet field information) from the search endpoint as it was with the old API: https://semanticlookup.zbmed.de/api/search?q=diabetes&exact=false&obsoletes=false&groupField=true&rows=10&start=0

We use the type and ontology names and counts for filtering the search results.