Feature/sqlite repo: setup for GeoLocationServiceSqlRepoDBTest (#68)

Unstable, active and WIP: This is where things start taking shape for setting test coverage
`GeoLocationServiceSqlRepoDBTest` to implement issue: #26 ;

- major rewrite of test services for integration test for Sqlite Repo
DB. refactored code to use container to setup database using
start_test_database and asyncSetUp. WIP: test_fetch_facilities
- added sqlite models to support sqlite database. database.py enhances
app level infra setup using DI using rodi's Container that sets up
database and session

xcov19/tests/test_services.py

@@ -1,4 +1,5 @@
 from collections.abc import Callable
+from contextlib import AsyncExitStack
 from typing import List
 import pytest
 import unittest