fix: archive ownerless repositories without assigning ownership (#800)

src/server/routes/repository-public.ts

@@ -309,6 +309,7 @@ router.get(
       try {
         user = await getUser(req);
       } catch { /* not logged in */ }
+      repo.assertNotArchived();
       const canEdit =
         !!user &&
         (user.isAdmin ||