Improve logging for brave debuggers

[csuhta]

The bot logs what it is looking up to the console, but it would also be helpful if it could log these additional things, if possible:

• Who summoned the bot
• On what server and channel
• What they typed in the braces
• The Scryfall API server response

[chuckharmston]

That seems pretty noisy. Maybe we should throw this all behind a verbosity flag, which we enable on a staging deployment?

[chuckharmston]

I also don't think we have access to the server name 😞. I wanted to include that in the GA params, but couldn't find anything.