fix(server): Add validation for empty URL list in citygml packer (#341) #2973

Job	Run time
prepare	7s
ci-geo	0s
ci-tiles	0s
ci-extension	0s
ci-tools	0s
ci-worker	0s
ci-server / ci-server-lint	20s
ci-server / ci-server-test	1m 4s
build-geo	0s
build-tiles	0s
build-worker	0s
deploy-extension-dev	0s
deploy-tiles-dev	0s
deploy-worker-dev	0s
deploy-geo-dev	0s
ci	1s
build-server / Build and push Docker image	2m 32s
deploy-server-dev	2s
	4m 6s

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