try to lazy init db another way

app/__init__.py

@@ -88,9 +88,10 @@ encryption = None
 zendesk_client = None
 redis_store = RedisClient()
 document_download_client = None
+notification_provider_clients = None
 
-notification_provider_clients = NotificationProviderClients()
-
+# LocalProxy doesn't evaluate the target immediately, but defers
+# resolution to runtime.  So there is no monkeypatching concern.
 api_user = LocalProxy(lambda: g.api_user)
 authenticated_service = LocalProxy(lambda: g.authenticated_service)
 
@@ -181,10 +182,12 @@ def create_app(application):
     logging.init_app(application)
 
     # start lazy initialization for gevent
+    # NOTE: notify_celery and redis_store are safe to construct here
+    # because all entry points (gunicorn_entry.py, run_celery.py) apply
+    # monkey.patch_all() first.
+    # Do NOT access or use them before create_app() is called and don't
+    # call create_app() in multiple places.
 
-    # Set db engine settings here for now.
-    # They were not being set previous (despite environmental variables with appropriate
-    # sounding names) and were defaulting to low values
     db = SQLAlchemy(
         engine_options={
             "pool_size": config.Config.SQLALCHEMY_POOL_SIZE,
@@ -213,9 +216,7 @@ def create_app(application):
     aws_sns_client.init_app(application)
     encryption = Encryption()
     encryption.init_app(application)
-
-    # end lazy initialization
-
+    notification_provider_clients = NotificationProviderClients()
     # If a stub url is provided for SES, then use the stub client rather than the real SES boto client
     email_clients = (
         [aws_ses_stub_client]
@@ -225,6 +226,7 @@ def create_app(application):
     notification_provider_clients.init_app(
         sms_clients=[aws_sns_client], email_clients=email_clients
     )
+    # end lazy initialization
 
     notify_celery.init_app(application)
     redis_store.init_app(application)

tests/app/dao/test_annual_billing_dao.py

@@ -2,8 +2,7 @@ import pytest
 from freezegun import freeze_time
 from sqlalchemy import select
 
-import application
-from app import create_app, db
+from app import db
 from app.dao.annual_billing_dao import (
     dao_create_or_update_annual_billing_for_year,
     dao_get_all_free_sms_fragment_limit,
@@ -19,7 +18,6 @@ from tests.app.db import create_annual_billing, create_service
 
 
 def test_dao_update_free_sms_fragment_limit(notify_db_session, sample_service):
-    create_app(application)
     new_limit = 9999
     year = get_current_calendar_year_start_year()
     dao_create_or_update_annual_billing_for_year(sample_service.id, new_limit, year)