CModelDataReader::dataRead signal only triggered with single URL

[ltoenning]

A single call to CModelDataReader::read can trigger multiple reads for different entities with different URLs. But only the last used URL is passed with the signal here:

https://github.com/swift-project/pilotclient/blob/0c29b279f836ae99795b20c83f42563c47732a08/src/blackcore/db/modeldatareader.cpp#L239-L242

I do not assume that this is intended behavior.