[Flow] Logging changes to entities

[Jan Greth]

> AFAIK there is on logging done for database record changes. But if I
> want to do it then I would simply implement a PersistenceLoggingAspect
> crosscutting add/update/remove methods of base repository class and
> either use a SystemLogger or you can have your own PersistenceLogger
> implemented.

Thanks for the Info Pankaj.
Do you generally have further Infos about Logging in Flow?
I think about something to close the gap of knowledge of the 
documentation...