初回コミット: AltStore PAL向けADPホスティングSaaS

- Fastify API・Node Worker・PostgreSQL・S3互換ストレージ構成
- ADP ZIPのマルチパートアップロードとManifest検証（パストラバーサル・ZIP爆弾等を拒否）
- manifest.json/signatureは再シリアライズせず元バイト列を保持
- Cloudflare風の運用向け管理ダッシュボード（shadcn/Radix・日本語UI・4ルート）
  概要/Sources/アプリ/リリース + ルートランディングページ
- 汎用OIDC SSO・Workspace単位の認可・demo mode
- 匿名配布: /sources/{slug}/source.json, /artifacts/{releaseId}/manifest.json
- Docker Compose対応

build/sites-vite-plugin.ts

@@ -0,0 +1,45 @@
+import { access, cp, mkdir, rm } from "node:fs/promises";
+import { resolve } from "node:path";
+import type { Plugin } from "vite";
+
+async function exists(path: string): Promise<boolean> {
+  try {
+    await access(path);
+    return true;
+  } catch (error) {
+    if ((error as NodeJS.ErrnoException).code === "ENOENT") {
+      return false;
+    }
+    throw error;
+  }
+}
+
+// Packages Sites metadata and migrations after Vite finishes compiling.
+export function sites(): Plugin {
+  let root = process.cwd();
+
+  return {
+    name: "sites",
+    apply: "build",
+    configResolved(config) {
+      root = config.root;
+    },
+    async closeBundle() {
+      const outputDirectory = resolve(root, "dist", ".openai");
+      const hostingConfig = resolve(root, ".openai", "hosting.json");
+      const drizzleSource = resolve(root, "drizzle");
+
+      await rm(outputDirectory, { recursive: true, force: true });
+      await mkdir(outputDirectory, { recursive: true });
+
+      if (await exists(hostingConfig)) {
+        await cp(hostingConfig, resolve(outputDirectory, "hosting.json"));
+      }
+      if (await exists(drizzleSource)) {
+        await cp(drizzleSource, resolve(outputDirectory, "drizzle"), {
+          recursive: true,
+        });
+      }
+    },
+  };
+}