refactor(telegram): avoid double-wrapping proxy fetch

src/telegram/proxy.ts

@@ -1,5 +1,4 @@
 import { ProxyAgent, fetch as undiciFetch } from "undici";
-import { wrapFetchWithAbortSignal } from "../infra/fetch.js";
 
 export function makeProxyFetch(proxyUrl: string): typeof fetch {
   const agent = new ProxyAgent(proxyUrl);
@@ -10,5 +9,7 @@ export function makeProxyFetch(proxyUrl: string): typeof fetch {
       ...(init as Record<string, unknown>),
       dispatcher: agent,
     }) as unknown as Promise<Response>) as typeof fetch;
-  return wrapFetchWithAbortSignal(fetcher);
+  // Return raw proxy fetch; call sites that need AbortSignal normalization
+  // should opt into resolveFetch/wrapFetchWithAbortSignal once at the edge.
+  return fetcher;
 }