HI Federico!
You can use a full power of self hosted github runner to create a different scenarions during operations with Github Actions.
Recently I created a Github Action for this case, to use it with Open Balena.
If you want, you can open a PR with updated version of Balena CLI to preload image with compression, and publish as build artifact in Github Actions.
Full guide how to setup Self-hosted Github Actions Runner here Manual
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