pub.search.handlers: Slow search: handler exceeded 200ms

I see a lot of these warnings in the search service logs. These messages obscure other warning level problems. We should either address the performance problem or demote the warning to a note.

However, dumping performance metrics to the logs is not the right solution. The right solution is to gather the performance data, plot that data, and monitor that instead and see if the probability distribution of latency is acceptable.