OZG-2220 remove items from TODO

Sub-task: OZG-3411

TODO

-- naming: OrganisationsEinheit, OrganisationEinheit, Organisationseinheit
-- package structure to distinguish http api, internal service grpc communication and domain, service, repository layers
 - Console logs switch to regular line by line instead of JSON entries. For local development only.
 - User managers needs to know it external hostname/address used by clients in order to put it in HAL response. So that the further REST calls are made to proper URI.
   -> either frontend sends the URL in request