[OPT-1418] The evaluation result of a combined report does not contain the data

given:
- I create a combined report that contains several single reports
when:
- I evaluate the combined report by id using the REST-API
then:
- I get the result of the combined report, but I don't get the related data (e.g. the report ids of the combined report)
expected:
- I get the result and the related data

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