EDIT

E+M use uuids for Authors, Teams and references

ref #3979 implement CdmPreferences for E+M Activator and some other changes for Activator

ref #7921 Caucasus area import for E+M

improve reference import for E+M (edition and volume handling)

ref #7894 import source numbers for E+M

ref #7823 implement user.person deduplication

ref #7799 deduplicate and parse authorteams

ref #7801 and ref #3787 deduplicate reference.authorstring and reference itself

#7799 reduce duplicated sources

improve performance for author loading in E+M