enhance: 編集されたノートかどうか分かるように

packages/backend/migration/1695901659683-note-updated-at.js

@@ -0,0 +1,11 @@
+export class NoteUpdatedAt1695901659683 {
+    name = 'NoteUpdatedAt1695901659683'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "note" ADD "updatedAt" TIMESTAMP WITH TIME ZONE`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "note" DROP COLUMN "updatedAt"`);
+    }
+}