We found that the reporting task failed twice because of integrity constraints.

This was because the rate_multiplier was being added as 1 and 1.0 which was not resolving to the same.
This updates the table to use Integrer.
Also changed the logging for the task.

app/celery/reporting_tasks.py

@@ -1,5 +1,6 @@
 from datetime import datetime, timedelta
 
+from flask import current_app
 from notifications_utils.statsd_decorators import statsd
 
 from app import notify_celery
@@ -24,3 +25,5 @@ def create_nightly_billing(day_start=None):
 
         for data in transit_data:
             update_fact_billing(data, process_day)
+
+    current_app.logger.info("create-nightly-billing task complete. {} rows updated".format(len(transit_data)))