Add order completed feature

[cemkuru]

[dnfadmin]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

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[erjain]

Hi @cemkuru, thanks for raising this PR, but due to some recent pushes, this branch is outdated and showing conflicts, can you resolve the conflicts, we will take it forward and review it. Also, can you share the thoughts behind the proposed changes?