Communicate with job

Hey there,
Thanks for the amazing library!
I'm wondering if it is possible to communicate with a job after it was created.
In my specific example merely changing the data property would be sufficient.
I found out [how to do it](https://github.com/Automattic/kue/issues/505), but the change of the job is not reflected in the worker (I use clustering).
```
Job.get(rId, (err, job) => {
if (job) {
(job.data as QueueRenderPayloadData).shouldStop = true
}
})
```

I also tried to emit function:
Job.get(rId, (err, job) => {
if (job) {
const emitWorked = job.emit('customevent', { stop: true })
}
})

But emitWorked is always false, is there something to keep in mind when using clustering and emitting?

Thanks for your help!

Start by tracing the Job.get and job.emit entry points through the clustered worker flow, then inspect how Redis-backed job state and events cross processes. Done means identifying the supported communication behavior or defining a narrowly scoped change, with verification for clustered workers.

Written by the indexing model from the issue text.