Determine if a live-node is: publishing only

[olle]

In order to make the metrics, in the list of live-nodes, valuable. It should be distinctly visible if a node is only publishing (responses), and such does not suffer from a low success rate.

Alternatively, calculate success rate with regards to published responses too, which at the moment is not really an issue (fire-and-forget) and would retain a very high success rate on average.

The goal is to avoid false negative feedback (red numbers) for nodes that are not performing badly.