Preallocate download streams (#229)

* feat: pre-allocate streams for high-latency downloads

* fix: update drop-base

* fix: remove debug latency

* fix: lint

server/middleware/latency.ts

@@ -1,3 +1,3 @@
 export default defineEventHandler(async () => {
-  // await new Promise((r) => setTimeout(r, 700));
+  // await new Promise((r) => setTimeout(r, 1400));
 });