audit log all the user queries

Right now, we don't know for what users are querying for. So, it'll be a good value addition if the admin can see what users are querying. 

IDEA: dataplane should send all the logs to controlplane. Control plane pushes the logs to respective data sinks. 

But, this put a lot of pressure on the control plane. We can make the dataplane to push the logs, but it'll be hard to configure.  