Major Description
aurora update start has a --read-json option, but there's no way with the client to actually synthesize compatible json from a job_key / config pair.
we should have aurora job inspect --write-json or possibly new aurora config read/write commands that allow users to build better automation stories around reified configurations as json blobs.
the complications here are binding helpers that add metadata to JobConfiguration which get lost. we might need a higher-level json schema that contains these extra fields.