Ability to monitor traffic volumes through the mediator

[WadeBarnes]

Add the ability to monitor when connections are made/severed with the mediator and to monitor the volume of messages that pass through the mediator.

Event bus hooks could be used to log these events.

This information is important for hosting purposes, as it helps to corollate message and connection volume to load on the system. This will help us to better understand the impact of volume on system resources to better plan and scale.

[swcurran]

As this is done, please document would data is going into the logs so that we call ensure that a minimum of correlatable data is collected, while still meeting the needs of planning/scaling.

[WadeBarnes]

Very good point. I meant to mention that we need to protect privacy.