Logging statements to try to understand a weird crash
[server] Don't flush after each insert.

We do inserts more frequently than I thought, so this isn't a
great idea for now.

We could introduce a synchronized insert endpoint or ?flush=true
later on.
[server] Show metricz intervals in order
Compare time.Times using .Equal
Improve logging configuration

Now the gumshoe user (the server) can control the logging gumshoe
does. This is nice because it allows us to not showlog output in
tests, and also because we can prefix gumshoe / server logs
separately.
Detailed logging of insert stats
[server] Wait N seconds between flushes rather than flushing every N seconds
Log details query stats
Ignore pkg dir
Fix log wording