Add endpoint GET:/submissions/{id}

[lkuchenb]

... to retreive a representation of a single submission

[cschu]

Does that just have to be the current content of a SubmissionResponse (id, label) or should it include additional information such as the associated metadatasets?

[lkuchenb]

We should include groupId, submissionDateTime and metadatasetIds

[cschu]

In the general SubmissionResponse or make a specialised version?

[lkuchenb]

That could also be included in the POST:submissions response 👍 So one response schema should be fine