fw/output: Implement retriving "augmentations" for `JobDatabaseOutput`s
fw/output: Implement retriving "augmentations" for `JobDatabaseOutput`s

Enable retriving augmentations on a per job basis when using a Postgres
database backend.

ARM-software/workload-automation,setrofim/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,ARM-software/workload-automation