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.

tests/app/dao/test_ft_billing_dao.py

@@ -7,7 +7,7 @@ from freezegun import freeze_time
 from app import db
 from app.dao.fact_billing_dao import (
     fetch_monthly_billing_for_year, fetch_billing_data_for_day, get_rates_for_billing,
-    get_rate
+    get_rate,
 )
 from app.models import FactBilling
 from app.utils import convert_utc_to_bst