Add the ability to create and store a summary of the network performance

[evan-forbes]

After each test, we need the ability to record specific metrics over network performance in a database so that we can compare results over time. This includes things like per validator bandwidth usage, network throughput, rounds missed, perhaps even time for a given transaction to be included or other items, along with the necessary metadata.

How we store metrics is kind of arbitary, but ideally they are stored somewhere where we are able to keep them there long term, and are able to query for specific results