ci: add PR quality and coverage gates

backend/accounts/tests.py

@@ -1,3 +1,2 @@
-from django.test import TestCase
 
 # Create your tests here.

backend/accounts/urls.py

@@ -2,7 +2,6 @@ from django.urls import path
 
 from .views import LoginView, LogoutView, MeView, RegisterView, VisitorMigrationView
 
-
 urlpatterns = [
     path("register/", RegisterView.as_view(), name="register"),
     path("login/", LoginView.as_view(), name="login"),