Added a date range filter for the get all services end point.

When the start_date and end_date query argruments exists in the request,
the query will return the results from the NotificationHistory table for the given date range.
We will need to check the performance of this query, but this will only be used by the platform admin page.

tests/app/dao/test_services_dao.py

@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timedelta
 import uuid
 import functools
 
@@ -21,7 +21,8 @@ from app.dao.services_dao import (
     dao_fetch_todays_stats_for_service,
     dao_fetch_weekly_historical_stats_for_service,
     fetch_todays_total_message_count,
-    dao_fetch_todays_stats_for_all_services
+    dao_fetch_todays_stats_for_all_services,
+    fetch_stats_by_date_range_for_all_services
 )
 from app.dao.users_dao import save_model_user
 from app.models import (
@@ -639,3 +640,19 @@ def test_dao_fetch_todays_stats_for_all_services_can_exclude_from_test_key(notif
 
     assert len(stats) == 1
     assert stats[0].count == 2
+
+
+def test_fetch_stats_by_date_range_for_all_services(notify_db, notify_db_session):
+    create_notification(notify_db, notify_db_session, created_at=datetime.now() - timedelta(days=4))
+    create_notification(notify_db, notify_db_session, created_at=datetime.now() - timedelta(days=3))
+    result_one = create_notification(notify_db, notify_db_session, created_at=datetime.now() - timedelta(days=2))
+    create_notification(notify_db, notify_db_session, created_at=datetime.now() - timedelta(days=1))
+    create_notification(notify_db, notify_db_session, created_at=datetime.now())
+
+    start_date = (datetime.utcnow() - timedelta(days=2)).date()
+    end_date = (datetime.utcnow() - timedelta(days=1)).date()
+
+    results = fetch_stats_by_date_range_for_all_services(start_date, end_date).all()
+
+    assert len(results) == 1
+    assert results[0] == ('sms', 'created', result_one.service_id, 2)