Refactor to vertical slice

apps/backend/src/modules/admin/features/unblock-user/unblock-user.business.ts

@@ -0,0 +1,12 @@
+import { db } from '@/lib/prisma';
+
+export async function unblockUser(userId: string): Promise<void> {
+  await db.user.update({
+    where: { id: userId },
+    data: {
+      banned: false,
+      bannedAt: null,
+      banReason: null,
+    },
+  });
+}