Restrict privileges per user on console_logs

[WayneNani]

The current implementation enables all users to query all logs. While often this is not a problem, there are some use-cases where this falls short of the security requirements.

I propose a new column to track which user has performed the log-Operation and a view for each user that only shows logs the user produced. This can of course be enhanced in the future to give users access to the logs of others.