Feature/v4backend

[consolethinks]

scicat-cli changes to support v4 be (v3 support is dropped by this). Closes #114

[minottic]

A general comment. Since the Bearer addition is used in multiple places, would it make sense to make it a function for reusability/later changes?

[minottic]

do I understand right that this, in addition to the filter here, checks if the ownerGroup is empty or it's equal to dataset.ownerGroup? If so, couldn't one achieve this by modifying the filter? Then (and also if not changing the filter), to find the missing datasets, one could transform datasetDetails into a map and loop over datasetList[i:end]. The ones which are not in the map are the ones missing. This will be O(n) (map creation) + O(m) (datasetList[i:end] loop), while the current implementation is O(~n (indexFunction) *m (loop)) (given the linear search, if I am not mistaken)

[minottic]

I think it's also a good idea to add a test for this

[consolethinks]

Yeah, I actually wanted to optimize it but I ended up just simplifying the original code. I'll try to apply your suggestion. (TODO)