The arm64 runner leg builds that platform natively, where libkrun
compiles and the libkrunfw part picks the arm64 pool .deb on its own.
Both snaps upload as artifacts and publish to stable from one job.
Testing runs the pre-commit trio on pushes to main and PRs.
Releasing builds the snap on plain vX tags and publishes it to the
stable store channel; rc tags fail the version gate and leave the
publish job skipped.
vhaudiquet