hello-world-app release v3.2.0

Add architecture value ("" | amd64 | arm64) to pin the workload to a CPU architecture. Setting arm64 renders both the kubernetes.io/arch node selector and the toleration for the kubernetes.io/arch=arm64:NoSchedule taint that Giant Swarm arm64 node pools carry – both are required, and setting only one fails in a different, non-obvious way, so a single value drives both. Defaults to "", which renders nothing, so output is unchanged for existing users. The scheduling logic lives in the hello-world.podScheduling helper and merges with the explicit nodeSelector/tolerations values.

Allow keys in nodeSelector, which the generated schema rejected via additionalProperties: false – any entry failed with “additional properties ‘’ not allowed”. Same class of bug as the affinity/podSecurityContext fix in 3.0.4.