test(oauth): exercise last-chance read in follower timeout test

Author: waleedlatif1

apps/sim/lib/concurrency/__tests__/leader-lock.test.ts

@@ -120,23 +120,25 @@ describe('withLeaderLock', () => {
   it('follower does a final read after timeout to catch a just-finished leader', async () => {
     redisConfigMockFns.mockAcquireLock.mockResolvedValueOnce(false)
 
+    // pollInterval=5, maxWait=9 → loop exits after 2 in-loop polls (T+5, T+10);
+    // the third call (polls=3) is the post-deadline last-chance read.
     let polls = 0
     const onFollower = vi.fn(async () => {
       polls += 1
-      // Return null during the poll loop, value on the post-deadline read.
       if (polls <= 2) return null
       return 'late-leader'
     })
 
     const result = await withLeaderLock<string>({
       key: 'k',
       pollIntervalMs: 5,
-      maxWaitMs: 12,
+      maxWaitMs: 9,
       onLeader: async () => 'should-not-run',
       onFollower,
     })
 
     expect(result).toBe('late-leader')
+    expect(onFollower).toHaveBeenCalledTimes(3)
   })
 
   it('follower returns null after timeout', async () => {