Refactor test utilities and enhance ASGI settings

- Cleaned up and standardized assertions in ApiTestMixin for API response validation.
- Updated ASGI settings to use os.environ for setting the DJANGO_SETTINGS_MODULE.
- Removed unused imports and improved formatting in settings.py.
- Refactored URL patterns in urls.py for better readability and organization.
- Enhanced view functions in views.py for consistency and clarity.
- Added .flake8 configuration for linting and style enforcement.
- Introduced type stubs for django-environ to improve type checking with Pylance.

rides/migrations/0002_add_business_constraints.py

@@ -112,7 +112,10 @@ class Migration(migrations.Migration):
             model_name="ridereview",
             constraint=models.CheckConstraint(
                 condition=models.Q(
-                    ("visit_date__lte", django.db.models.functions.datetime.Now())
+                    (
+                        "visit_date__lte",
+                        django.db.models.functions.datetime.Now(),
+                    )
                 ),
                 name="ride_review_visit_date_not_future",
                 violation_error_message="Visit date cannot be in the future",
@@ -123,10 +126,12 @@ class Migration(migrations.Migration):
             constraint=models.CheckConstraint(
                 condition=models.Q(
                     models.Q(
-                        ("moderated_at__isnull", True), ("moderated_by__isnull", True)
+                        ("moderated_at__isnull", True),
+                        ("moderated_by__isnull", True),
                     ),
                     models.Q(
-                        ("moderated_at__isnull", False), ("moderated_by__isnull", False)
+                        ("moderated_at__isnull", False),
+                        ("moderated_by__isnull", False),
                     ),
                     _connector="OR",
                 ),