test: initial test to enforce all functions in user_api_key_auth.py h… (#7797)

* test: initial test to enforce all functions in user_api_key_auth.py have direct testing

* test(test_user_api_key_auth.py): add is_allowed_route unit test

* test(test_user_api_key_auth.py): add more tests

* test(test_user_api_key_auth.py): add complete testing coverage for all functions in `user_api_key_auth.py`

* test(test_db_schema_changes.py): add a unit test to ensure all db schema changes are backwards compatible

gives user an easy rollback path

* test: fix schema compatibility test filepath

* test: fix test

litellm/proxy/auth/user_api_key_auth.py

@@ -155,6 +155,7 @@ def _is_allowed_route(
     """
     - Route b/w ui token check and normal token check
     """
+
     if token_type == "ui" and _is_ui_route(route=route, user_obj=user_obj):
         return True
     else: