automated CreateOrUpdate db - know when create and when update

[mika666]

in ef core cannot distinguish between create or update. perhaps in some future ef versions it will become possible.

• [x] work to be done in: MapHive.Core.DataModel.OrganizationDatabase.CreateOrUpdateDatabase

[mika666]

https://stackoverflow.com/questions/33911316/ef7-how-to-check-if-database-exists https://stackoverflow.com/questions/50682148/ef-core-2-1-verify-if-database-exists-dont-work-after-update