feat: Attachment 모델 추가 및 관련 기능 구현

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

blog/urls.py

@@ -2,7 +2,12 @@
 
 from django.urls import path, include
 from rest_framework.routers import DefaultRouter
-from .views import PostListView, PostListCreateView, PostDetailView, CommentViewSet, TagListView
+from .views import (
+    PostListView, PostListCreateView, PostDetailView,
+    CommentViewSet, TagListView,
+    AttachmentListCreateView, AttachmentDeleteView,
+    TempAttachmentUploadView, TempAttachmentDeleteView
+)
 
 # 댓글 라우터
 comment_router = DefaultRouter()
@@ -19,4 +24,16 @@ urlpatterns = [
 
     # 댓글 관련 (포스트 하위 리소스)
     path('posts/<int:post_pk>/', include(comment_router.urls)),
+
+    # 첨부파일 관련
+    path('posts/<int:post_pk>/attachments/',
+         AttachmentListCreateView.as_view(), name='attachment-list'),
+    path('posts/<int:post_pk>/attachments/<int:pk>/',
+         AttachmentDeleteView.as_view(), name='attachment-delete'),
+
+    # 임시 첨부파일 (게시글 작성 전 업로드)
+    path('attachments/upload/',
+         TempAttachmentUploadView.as_view(), name='temp-attachment-upload'),
+    path('attachments/<int:pk>/',
+         TempAttachmentDeleteView.as_view(), name='temp-attachment-delete'),
 ]