fix(e2e): bound kitchen sink RPC probes

test/scripts/kitchen-sink-rpc-walk.test.ts

@@ -3,7 +3,7 @@ import { existsSync, mkdirSync, mkdtempSync, readFileSync, rmSync, writeFileSync
 import { tmpdir } from "node:os";
 import path from "node:path";
 import { setTimeout as delay } from "node:timers/promises";
-import { describe, expect, it, vi } from "vitest";
+import { afterEach, describe, expect, it, vi } from "vitest";
 import {
   appendBoundedOutput,
   assertDiagnosticStabilityClean,
@@ -23,6 +23,10 @@ import {
 
 const posixIt = process.platform === "win32" ? it.skip : it;
 
+afterEach(() => {
+  vi.useRealTimers();
+});
+
 describe("kitchen-sink RPC isolated state", () => {
   it("cleans up the generated temporary home tree", async () => {
     const { root, env } = makeEnv();
@@ -459,6 +463,29 @@ describe("kitchen-sink RPC process sampling", () => {
     expect(fetchImpl).toHaveBeenCalledTimes(2);
   });
 
+  it("times out stalled HTTP probe response bodies", async () => {
+    vi.useFakeTimers();
+    const fetchImpl = vi.fn().mockResolvedValue({
+      ok: true,
+      status: 200,
+      text: () => new Promise(() => undefined),
+    });
+
+    const result = fetchJson("http://127.0.0.1:19680/readyz", {
+      attempts: 1,
+      fetchImpl,
+      timeoutMs: 100,
+    });
+    const rejection = expect(result).rejects.toMatchObject({
+      code: "ETIMEDOUT",
+      message: "fetch http://127.0.0.1:19680/readyz timed out after 100ms",
+    });
+
+    await vi.advanceTimersByTimeAsync(100);
+    await rejection;
+    expect(fetchImpl.mock.calls[0]?.[1]?.signal.aborted).toBe(true);
+  });
+
   it("fails when the sampled RSS exceeds the configured ceiling", () => {
     expect(() => assertResourceCeiling({ rssMiB: 2049 })).toThrow(
       "gateway RSS exceeded 2048 MiB: 2049 MiB",