text: Title: Get rid of `system` field in tracebacks/failure logging
  Body: Probably the `system` thing is a bogus feature that should be removed.
  1. You should be able to deduce what caused the problem from the logging action context.
  2. It's a traceback! It tells you exactly where it came from!Probably the system thing is a bogus feature that should be removed.
  
  Other places that takes a system should also be fixed.
  