feat: Implement MFA authentication, add ride statistics model, and update various services, APIs, and tests across the application.

backend/apps/api/v1/serializers_rankings.py

@@ -2,13 +2,14 @@
 API serializers for the ride ranking system.
 """
 
-from rest_framework import serializers
 from drf_spectacular.utils import (
-    extend_schema_serializer,
-    extend_schema_field,
     OpenApiExample,
+    extend_schema_field,
+    extend_schema_serializer,
 )
-from apps.rides.models import RideRanking, RankingSnapshot
+from rest_framework import serializers
+
+from apps.rides.models import RankingSnapshot, RideRanking
 
 
 @extend_schema_serializer(
@@ -179,6 +180,7 @@ class RideRankingDetailSerializer(serializers.ModelSerializer):
     def get_head_to_head_comparisons(self, obj):
         """Get top head-to-head comparisons."""
         from django.db.models import Q
+
         from apps.rides.models import RidePairComparison
 
         comparisons = (