fix(release): keep the updater configuration in the installer

Installing the previous build left an app that could not update itself: the
packaging path used to guarantee the native module build does not create the
updater configuration file, so the update client had nothing to read.

That file is now written from the single feed source and its presence in the
packaged app is checked before anything is published, so an installer that
cannot update can no longer be released.

scripts/ci/build-portable.mjs

@@ -146,6 +146,9 @@ if (!existsSync(appDir)) {
 // (실측 사고: better_sqlite3.node가 NODE_MODULE_VERSION 131 → Electron 130 요구)
 runNodeScript('scripts/ci/fix-native-abi.mjs', ['--dir', appDir])
 runNodeScript('scripts/ci/verify-native-abi.mjs', ['--dir', appDir])
+// electron-builder의 --dir/--prepackaged 경로는 app-update.yml을 만들지 않는다.
+// 이 파일이 없으면 electron-updater가 설정을 읽지 못해 자동 업데이트가 죽는다(실측).
+runNodeScript('scripts/ci/write-app-update-yml.mjs', ['--dir', appDir])
 
 // 이전 볼륨 정리 (같은 버전 재드 시 잔여 볼륨이 섞이지 않도록)
 for (const name of readdirSync(releaseDir)) {