feat: utilize uv CI cache #443

Job	Run time
Build, stable, linux/arm64	18m 59s
Build, stable, linux/amd64	5m 3s
Test basic, stable	3m 14s
Anchore Container Scan	1m 14s
Trivy Container Scan	2m 32s
Test SAML, stable	2m 8s
Test single celery process, stable	2m 37s
Test novolume, stable	3m 7s
Test split, stable	2m 28s
Test SSL, stable	2m 7s
Merge images	2m 40s
Publish to GitHub, stable	0s
Publish to Docker Hub, stable	0s
Create release on GitHub	0s
	46m 9s

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