run tests under python 3.14 as well #581

Job	Run time
Modern Python (3.12)	3m 25s
Code style	9s
Modern Python (3.9)	3m 30s
Modern Python (3.10)	3m 50s
Modern Python (3.14)	3m 44s
Modern Python (3.13)	3m 43s
Modern Python (3.11)	3m 49s
Build, test and deploy container images (kas-isar, debian-trixie)	24m 40s
Build, test and deploy container images (kas, debian-bookworm)	15m 14s
Build, test and deploy container images (kas, debian-trixie)	28m 28s
Build, test and deploy container images (kas-isar, debian-bookworm)	11m 10s
cleanup untagged kas-isar containers	28s
cleanup untagged kas containers	23s
	1h 42m 33s

Provide feedback