enhance(backend): UserListMembershipにユーザーリストの作成者IDを非正規化

packages/backend/migration/1696807733453-userListUserId.js

@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class UserListUserId1696807733453 {
+    name = 'UserListUserId1696807733453'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "user_list_membership" ADD "userListUserId" character varying(32) NOT NULL DEFAULT ''`);
+				const memberships = await queryRunner.query(`SELECT "id", "userListId" FROM "user_list_membership"`);
+				for(let i = 0; i < memberships.length; i++) {
+					const userList = await queryRunner.query(`SELECT "userId" FROM "user_list" WHERE "id" = $1`, [memberships[i].userListId]);
+					await queryRunner.query(`UPDATE "user_list_membership" SET "userListUserId" = $1 WHERE "id" = $2`, [userList[0].userId, memberships[i].id]);
+				}
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "user_list_membership" DROP COLUMN "userListUserId"`);
+    }
+}