Get an error with an associated HTTP status code.

TODO: KiB, MiB etc.

Incremental job identifier.

Singleton job manager.

Utilities for the REST API endpoints.

Job is a potentially long running background task such as executing an external command in a goroutine.

Job manager creates, starts and stops jobs and maintains a list of active jobs.

Type for job runners that are cancelable.

Contract for types that require notification when a job is completed.

Job runners start a job running and must return a job.