Require a worker version or worker run in CreateElements

Closes #1389 (closed)

requested review from @babadie

assigned to @vrigal

I don't know if it is relevant to those changes, but all those endpoints could probably be moved to the ml section of the schema. It is not mentioned in #1388 (closed)

resolved all threads

added 1 commit

• b1d580bc - Test attributes in a less verbose way

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enabled an automatic merge when the pipeline for b1d580bc succeeds

merged