perf(test): remove timer waits in hooks and discord monitor tests

src/discord/monitor.test.ts

@@ -1,6 +1,5 @@
 import { ChannelType, type Guild } from "@buape/carbon";
 import { describe, expect, it, vi } from "vitest";
-import { sleep } from "../utils.js";
 import {
   allowListMatches,
   buildDiscordMediaPayload,
@@ -108,7 +107,7 @@ describe("DiscordMessageListener", () => {
       {} as unknown as import("./monitor/listeners.js").DiscordMessageEvent,
       {} as unknown as import("@buape/carbon").Client,
     );
-    await sleep(0);
+    await Promise.resolve();
 
     expect(logger.error).toHaveBeenCalledWith(expect.stringContaining("discord handler failed"));
   });

src/hooks/internal-hooks.test.ts

@@ -109,7 +109,7 @@ describe("hooks", () => {
 
     it("should handle async handlers", async () => {
       const handler = vi.fn(async () => {
-        await new Promise((resolve) => setTimeout(resolve, 10));
+        await Promise.resolve();
       });
 
       registerInternalHook("command:new", handler);