Filter log lines by user details

[jay-khatri]

Adding the ability to filter log lines by the user details reported in a session. I would imagine this isn't too difficult; whenever we pass a session id to a log, we could also inject the user details into the log line?

[emosenkis]

It would be nice to have support in the backend for specifying user information also - sometimes logs or errors are specific to a user even if they don't originate from a frontend request or the user isn't logged into the frontend.