feat: 新增 cloud-artifacts 包（Cloudflare Worker HTML artifact 托管）

POST /upload 鉴权上传 HTML 到 R2 返回 hash URL，GET /<7d|30d>/<id>.html
由 Worker 代理读取并直出 text/html。R2 lifecycle rule 自动 7/30 天删除。
独立服务，不被主 CLI 引用（类似 packages/remote-control-server/ 定位）。

Co-Authored-By: glm-5.2 <zai-org@claude-code-best.win>

packages/cloud-artifacts/tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ES2022",
+    "moduleResolution": "Bundler",
+    "lib": ["ES2022"],
+    "strict": true,
+    "noEmit": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "include": ["worker-configuration.d.ts", "src/**/*.ts"]
+}