fix(cloudflare): serve version.json as static asset

Avoid Workers billing for /version.json by removing worker-first routing and generating static _headers rules during manifest build.

packages/cloudflare/src/index.ts

@@ -2,28 +2,8 @@ export interface Env {
   ASSETS: { fetch: (request: Request) => Promise<Response> }
 }
 
-function withHeader(response: Response, key: string, value: string): Response {
-  const headers = new Headers(response.headers)
-  headers.set(key, value)
-  return new Response(response.body, {
-    status: response.status,
-    statusText: response.statusText,
-    headers,
-  })
-}
-
 export default {
   async fetch(request: Request, env: Env): Promise<Response> {
-    const url = new URL(request.url)
-
-    if (url.pathname === "/version.json") {
-      const assetResponse = await env.ASSETS.fetch(request)
-
-      // Ensure this stays fresh; the server uses it on startup.
-      const withCache = withHeader(assetResponse, "Cache-Control", "no-cache")
-      return withHeader(withCache, "Content-Type", "application/json; charset=utf-8")
-    }
-
-    return new Response("Not found", { status: 404 })
+    return env.ASSETS.fetch(request)
   },
 }