Job Management

Job results, cancellation, listing, and error history.

Results & cancellation

Method	Description
`getJob(id)` → `Optional<Job>`	A job snapshot (status, progress, timestamps).
`awaitJob(id, Duration)` → `Optional<Job>`	Block until terminal; throws on timeout.
`getResult(id)` → `Optional<byte[]>` / `getResult(id, Class<R>)` → `Optional<R>`	The job's result, raw or deserialized.
`cancel(id)`	Cancel a pending job.
`requestCancel(id)` / `isCancelRequested(id)`	Cooperative cancellation of a running job.
`setProgress(id, int)`	Record 0–100 progress for inspection / the dashboard.

Method	Description
`listJobs(JobFilter)`	List jobs — filter by status/queue/task with limit/offset.
`jobErrors(id)` → `List<JobError>`	Per-attempt error history.