Address review feedback

fix: increase handler delay so wip event fires in workId correlation test

The wip event is rate-limited to once per 2s and only fires when
onFetch processes jobs. With delay(50) the job completes before 2s
elapses from manager creation, so emitWip never fires and the test
times out. Increase to delay(3000) so the end-of-onFetch emitWip
call happens after the 2s threshold.

Also resolve handlerCompleted before the delay so it doesn't
block the wip assertions.

Author: bcomnes

test/workTest.ts

@@ -333,14 +333,22 @@ describe('work', function () {
 
     const firstWipEvent = new Promise<Array<any>>(resolve => ctx.boss!.once('wip', resolve))
 
+    let handlerCompletedResolve: () => void
+    const handlerCompleted = new Promise<void>(resolve => { handlerCompletedResolve = resolve })
+
     await ctx.boss.send(ctx.schema)
 
-    const workId = await ctx.boss.work(ctx.schema, { localConcurrency: 3, pollingIntervalSeconds: 1 }, () => delay(2000))
+    const workId = await ctx.boss.work(ctx.schema, { localConcurrency: 3, pollingIntervalSeconds: 1 }, async () => {
+      handlerCompletedResolve()
+      await delay(3000)
+    })
 
     const wip = await firstWipEvent
 
     expect(wip.every((w: any) => w.workId === workId)).toBe(true)
     expect(wip.length).toBe(3)
+
+    await handlerCompleted
   })
 
   it('should reject work() after stopping', async function () {