test: dedupe fixtures and test harness setup

src/cron/service.store.migration.test.ts

@@ -1,28 +1,13 @@
 import fs from "node:fs/promises";
-import os from "node:os";
 import path from "node:path";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { CronService } from "./service.js";
+import { createCronStoreHarness, createNoopLogger } from "./service.test-harness.js";
 import { DEFAULT_TOP_OF_HOUR_STAGGER_MS } from "./stagger.js";
 import { loadCronStore } from "./store.js";
 
-const noopLogger = {
-  debug: vi.fn(),
-  info: vi.fn(),
-  warn: vi.fn(),
-  error: vi.fn(),
-};
-
-async function makeStorePath() {
-  const dir = await fs.mkdtemp(path.join(os.tmpdir(), "openclaw-cron-migrate-"));
-  return {
-    dir,
-    storePath: path.join(dir, "cron", "jobs.json"),
-    cleanup: async () => {
-      await fs.rm(dir, { recursive: true, force: true });
-    },
-  };
-}
+const noopLogger = createNoopLogger();
+const { makeStorePath } = createCronStoreHarness({ prefix: "openclaw-cron-migrate-" });
 
 async function writeLegacyStore(storePath: string, legacyJob: Record<string, unknown>) {
   await fs.mkdir(path.dirname(storePath), { recursive: true });