Refactor error handling #436

Job	Run time
Check DockerHub secrets exist	1s
test (debos-arch)	1m 49s
test (debos-bookworm)	1m 9s
test (debos-bullseye)	58s
test (debos-trixie)	1m 24s
Build Docker container	7m 36s
Run unit tests	3m 18s
recipes on nofakemachine	1m 8s
debian (amd64) on nofakemachine	1m 26s
debian (arm64) on nofakemachine	3m 6s
debian (armhf) on nofakemachine	3m 0s
recipes on qemu	1m 16s
debian (amd64) on qemu	8m 7s
debian (arm64) on qemu	53m 57s
debian (armhf) on qemu	34m 19s
recipes on uml	53s
debian (amd64) on uml	6m 38s
debian (arm64) on uml	11m 44s
debian (armhf) on uml	17m 23s
arch on arch	12m 31s
partitioning on qemu	1m 35s
apertis on uml	7m 38s
partitioning on uml	1m 11s
allgreen	2s
Publish to DockerHub	0s
Publish to GHCR	0s
	3h 2m 9s

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