Update FactStatus table in bulk for each service

Previously we were looping over data from the Notifications/History
table and then shovelling it into the status table, one row at a time
- plus an extra delete to clean up any existing data.

This replaces that with a batch insertion, similar to how we archive
notifications [1], but using a simple subquery (via "from_select" [2])
instead of a temporary table.

To make the select compatible with the insert, I've used "literal"
to inject the constant pieces of data, so each row has everything it
needs to go into the status table.

[1]: 9ce6d2fe92/app/dao/notifications_dao.py (L295)
[2]: https://docs.sqlalchemy.org/en/14/core/dml.html#sqlalchemy.sql.expression.Insert.from_select

app/celery/reporting_tasks.py

@@ -10,10 +10,7 @@ from app.dao.fact_billing_dao import (
     fetch_billing_data_for_day,
     update_fact_billing,
 )
-from app.dao.fact_notification_status_dao import (
-    fetch_status_data_for_service_and_day,
-    update_fact_notification_status,
-)
+from app.dao.fact_notification_status_dao import update_fact_notification_status
 from app.dao.notifications_dao import get_service_ids_with_notifications_on_date
 from app.models import EMAIL_TYPE, LETTER_TYPE, SMS_TYPE
 
@@ -117,23 +114,8 @@ def create_nightly_notification_status():
 def create_nightly_notification_status_for_service_and_day(process_day, service_id, notification_type):
     process_day = datetime.strptime(process_day, "%Y-%m-%d").date()
 
-    start = datetime.utcnow()
-    new_status_rows = fetch_status_data_for_service_and_day(
-        process_day=process_day,
-        notification_type=notification_type,
-        service_id=service_id,
-    )
-
-    end = datetime.utcnow()
-    current_app.logger.info(
-        f'create-nightly-notification-status-for-service-and-day task fetch '
-        f'for {service_id}, {notification_type} for {process_day}: '
-        f'data fetched in {(end - start).seconds} seconds'
-    )
-
     start = datetime.utcnow()
     update_fact_notification_status(
-        new_status_rows=new_status_rows,
         process_day=process_day,
         notification_type=notification_type,
         service_id=service_id
@@ -143,5 +125,5 @@ def create_nightly_notification_status_for_service_and_day(process_day, service_
     current_app.logger.info(
         f'create-nightly-notification-status-for-service-and-day task update '
         f'for {service_id}, {notification_type} for {process_day}: '
-        f'data updated in {(end - start).seconds} seconds'
+        f'updated in {(end - start).seconds} seconds'
     )