feat: register ai admin URL routes

ai/urls/admin.py

@@ -0,0 +1,7 @@
+from django.urls import path
+
+from ..views.admin import AIAnalysisAdminAPI
+
+urlpatterns = [
+    path("ai/reports", AIAnalysisAdminAPI.as_view()),
+]

oj/urls.py

@@ -20,6 +20,7 @@ urlpatterns = [
     path("api/", include("tutorial.urls.tutorial")),
     path("api/admin/", include("tutorial.urls.admin")),
     path("api/", include("ai.urls.oj")),
+    path("api/admin/", include("ai.urls.admin")),
     path("api/", include("flowchart.urls.oj")),
     path("api/admin/", include("flowchart.urls.admin")),
     path("api/", include("problemset.urls.oj")),