fix(telegram): move network fallback to resolver-scoped dispatchers (#40740)

Merged via squash.

Prepared head SHA: a4456d48b4
Co-authored-by: sircrumpet <4436535+sircrumpet@users.noreply.github.com>
Co-authored-by: obviyus <22031114+obviyus@users.noreply.github.com>
Reviewed-by: @obviyus

src/telegram/audit.test.ts

@@ -2,16 +2,22 @@ import { beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
 
 let collectTelegramUnmentionedGroupIds: typeof import("./audit.js").collectTelegramUnmentionedGroupIds;
 let auditTelegramGroupMembership: typeof import("./audit.js").auditTelegramGroupMembership;
+const undiciFetch = vi.hoisted(() => vi.fn());
+
+vi.mock("undici", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("undici")>();
+  return {
+    ...actual,
+    fetch: undiciFetch,
+  };
+});
 
 function mockGetChatMemberStatus(status: string) {
-  vi.stubGlobal(
-    "fetch",
-    vi.fn().mockResolvedValueOnce(
-      new Response(JSON.stringify({ ok: true, result: { status } }), {
-        status: 200,
-        headers: { "Content-Type": "application/json" },
-      }),
-    ),
+  undiciFetch.mockResolvedValueOnce(
+    new Response(JSON.stringify({ ok: true, result: { status } }), {
+      status: 200,
+      headers: { "Content-Type": "application/json" },
+    }),
   );
 }
 
@@ -31,7 +37,7 @@ describe("telegram audit", () => {
   });
 
   beforeEach(() => {
-    vi.unstubAllGlobals();
+    undiciFetch.mockReset();
   });
 
   it("collects unmentioned numeric group ids and flags wildcard", async () => {