Add logging/stats

[PixeLInc]

As of now, there are no statistics or logging of the usage of DrawBot.
This is extremely inconvenient as those stats are pretty useful in the development of the bot.

A nice solution, in my opinion, would be maybe a Grafana dashboard, stored in either a grafana db or something like Redis.
This should log command usage stats, as well as CPU/memory loads throughout the day and maybe some other things.

[z64]

We should try to consolidate deployment as much as possible. drawbot is ridiculously simple; in general, I don't think its worth adding ancillary services that the end user doesn't directly see a benefit from.

Realistically the most I can see us adding for drawbots current scope is PG. We'll need a database at some point, whether it is SQLite or a full DBMS, and I would not underestimate what can be done with PG alone.

Stats would be perfectly fine to log with a DBMS, and there are likely plenty of existing tools we can use to generate visualizations; even something as simple as dumping a CSV to drop into google sheets / JSON.

So I'll leave it to you to decide whatever the frontend for this is, but as far as data collection itself goes, that's my two cents - do whatever gives us the most value up & down the stack.