fix: VM 시간 변경 후 턴 lease를 안전하게 자동 복구

app/game-engine/test/leaseStartupRetry.test.ts

@@ -0,0 +1,28 @@
+import { describe, expect, it, vi } from 'vitest';
+import { TurnDaemonLeaseUnavailableError } from '../src/lifecycle/databaseTurnDaemonLease.js';
+import { retryTurnDaemonLeaseStartup } from '../src/turn/leaseStartupRetry.js';
+
+describe('lease startup retry', () => {
+    it('survives more than the PM2 startup failure budget and returns only a fresh runtime', async () => {
+        const freshRuntime = { owner: 'new-owner' };
+        let attempts = 0;
+        const create = vi.fn(async () => {
+            if (++attempts <= 20) throw new TurnDaemonLeaseUnavailableError('test');
+            return freshRuntime;
+        });
+        const wait = vi.fn(async () => {});
+        expect(await retryTurnDaemonLeaseStartup(create, wait)).toBe(freshRuntime);
+        expect(create).toHaveBeenCalledTimes(21);
+        expect(wait).toHaveBeenCalledTimes(20);
+    });
+    it('propagates gameplay or startup faults instead of hiding them in a retry loop', async () => {
+        const error = new Error('invalid world');
+        const create = vi.fn(async () => {
+            throw error;
+        });
+        const wait = vi.fn(async () => {});
+        await expect(retryTurnDaemonLeaseStartup(create, wait)).rejects.toBe(error);
+        expect(create).toHaveBeenCalledTimes(1);
+        expect(wait).not.toHaveBeenCalled();
+    });
+});