importAnnotations in ReviewStrategy sets layerFamily metadata as childs metadata, which breaks WHO saving

[konrad-gerlach]

Description
When saving WHO annotation, we get an error stating, that

This code seems responsible found in review-strategy.ts, which sets the family's metadata as the first child's metadata. However, in the WHO case we need to differentiate between annotationUUID and annotationDataUUID.
const familyFiles = this.store.editor.activeDocument?.createLayerFamily( annotationFiles, Annotation ${idx + 1}, { ...annotationFiles[0]?.metadata }, );