Consolidate redis streams

[eikek]

Currently, there are the following redis streams

• project.[created|updated|removed]
• projectAuth.[created|updated|removed]
• user.[added|updated|removed]
• group.[added|updated|removed]
• groupMember.[added|updated|removed]

Now we want to have fewer streams with the idea of one per entity type. This would be then

• project = project.[created|updated|removed] + projectAuth.[created|updated|removed]
• user = user.[added|updated|removed]
• group = group.[added|updated|removed] + groupMember.[added|updated|removed]

As a first step, search can read from all streams combined and once data services pushes only to the new streams, the previous ones can be removed here.

[eikek]

The next discussion brought us to use only a single stream to sync data between data-services and search components.