Run CRS update + CSV as a nightly Celery task

[aih]

The CSV should be produced automatically after the CRS scraper is run. The CRS scraper should only get new files (if possible) and the CSV should be updated to include the new records (if possible). It's ok to re-run the CSV script, which takes ~ 5 minutes to run.

[aih]

This is now implemented:
https://github.com/aih/FlatGov/blob/main/server_py/flatgov/flatgov/celery.py#L42

'crs_scraper_daily': {
'task': 'bills.tasks.crs_task',
'schedule': crontab(minute=0, hour=1),
'options': {'queue': 'bill'}
},