feat: ADRF async views (phase1) + native async serializers (phase2) + async cache infra

user/views/activities.py

@@ -1,5 +1,5 @@
 from django.db.models import Q
-from rest_framework.views import APIView
+from adrf.views import APIView
 from rest_framework.permissions import IsAuthenticated
 from rest_framework import status
 from drf_yasg.utils import swagger_auto_schema
@@ -27,7 +27,7 @@ class UserActivityView(APIView):
         ],
         responses={200: success_response, 401: unauthorized_response},
     )
-    def get(self, request):
+    async def get(self, request):
         user = request.user
         page = int(request.query_params.get('page', 1))
         page_size = int(request.query_params.get('page_size', 20))
@@ -36,7 +36,7 @@ class UserActivityView(APIView):
 
         # 文章活动
         articles = Article.objects.filter(author=user, status='published').order_by('-created_at')[:50]
-        for article in articles:
+        async for article in articles:
             activities.append({
                 'id': f'article_{article.id}',
                 'type': 'article',
@@ -50,7 +50,7 @@ class UserActivityView(APIView):
 
         # 收藏活动
         favorites = CourseFavorite.objects.filter(user=user).select_related('course').order_by('-created_at')[:50]
-        for fav in favorites:
+        async for fav in favorites:
             activities.append({
                 'id': f'favorite_{fav.id}',
                 'type': 'favorite',
@@ -64,7 +64,7 @@ class UserActivityView(APIView):
 
         # 学习进度
         reads = ChapterRead.objects.filter(user=user, completed=True).select_related('chapter', 'course').order_by('-completed_at')[:50]
-        for read in reads:
+        async for read in reads:
             activities.append({
                 'id': f'study_{read.id}',
                 'type': 'study',