use vocabulary for labels in label service instead of labels from data
Currently the values in the label-service (see https://oersi.org/resources/pages/en/docs/api/label/) are all determined during import of our data. The prefLabel
s from the data are taken and stored in the backend to provide it via the service.
This is a process that is highly dependent on the scheme used.
We want to change this and use skos-vocabularies for this directly. The vocabulary should be synchronized periodically (ie once a day) and the label-service should use the labels from the local vocabulary.