livecloud-labs

After some digging through the codebase, it looks as though the `websocket.messages_received` and `websocket.receive_rate` values are only applied to the output when `capture` is [enabled for a specific step](https://github.com/artilleryio/artillery/blob/65dd5386c960e1d93f7e208784036e91fb663d00/packages/core/lib/engine_ws.js#L188). Unfortunately,...

Right, good call. A new API would make way more sense here. It's something I need to implement anyway, so I'm happy to pick this up and have a crack...