Change how CSV files are retrieved

[waldoj]

Right now, the effort to retrieve BILLS.CSV at 1:55 AM fails every time, and the 2:20 AM effort to retrieve HISTORY.CSV and vote.csv likewise fails every time. The former two are presumably because the files are being regenerated them, the latter because the session hasn't started and the file doesn't exist yet. This generates serious errors every night, which is annoying—I wake up to them on my phone's lock screen every day.

• don't try to get vote.csv if the session hasn't started
• don't try to get BILLS.CSV or HISTORY.CSV during the witching hour (or, alternately, suppress error logging of those queries during those times)