There are two mutations which are relevent to jobs:

• Poll
• Kill

Currently, these are implemented as task mutations for historical reasons. This means that we cannot poll or kill an arbitrary job, only the latest instance via the task.

We should preserve the ability to run these mutations against tasks as it's useful to be able to poll/kill the latest submission without knowing its number, however, we should add job mutations for finer control.

This essentially boils down to addressing this TODO:

And adding job filtering into the kill/poll commands.