Follow-up from "Make register job service to be resillient"

The following discussions from !19150 (merged) should be addressed:

• @smcgivern started a discussion: (+1 comment)

  Unrelated to this MR: should these strings be translatable?

• @fabiopitino started a discussion: (+2 comments)

  Shouldn't recoverable? and unrecoverable? be defined in the model? They seem to define domain logic rather than presentation.