enhance(backend): 初期設定をスキップした場合の初期状態ポリシーでインポート系をオプトインに

Resolve #16540

packages/backend/src/core/RoleService.ts

@@ -101,11 +101,11 @@ export const DEFAULT_POLICIES: RolePolicies = {
 	userEachUserListsLimit: 50,
 	rateLimitFactor: 1,
 	avatarDecorationLimit: 1,
-	canImportAntennas: true,
-	canImportBlocking: true,
-	canImportFollowing: true,
-	canImportMuting: true,
-	canImportUserLists: true,
+	canImportAntennas: false,
+	canImportBlocking: false,
+	canImportFollowing: false,
+	canImportMuting: false,
+	canImportUserLists: false,
 	chatAvailability: 'available',
 	uploadableFileTypes: [
 		'text/plain',