fix(server): restore Cloudflare global Kura deploys

Summary

• Enable Cloudflare load balancing for the production Kura controller so the main eu-central cluster can publish the global Kura endpoint.
• Pin the regional Kura Cloudflare token reference to a stable 1Password item ID in Helm values so duplicate item titles do not break ESO or CI resolution.
• Update the regional deploy script to read the same stable token ID explicitly when CLOUDFLARE_API_TOKEN is not pre-set.

Testing

• bash -n infra/mise/tasks/k8s/deploy-kura-regionals.sh
• helm template tuist infra/helm/tuist -f infra/helm/tuist/values-managed-common.yaml -f infra/helm/tuist/values-managed-production.yaml --set server.image.tag=sha-test --set processor.image.tag=sha-test --set kuraController.image.tag=sha-test >/tmp/tuist-prod-render.yaml
• helm template tuist infra/helm/tuist -f infra/helm/tuist/values-managed-kura-region.yaml --set kuraController.image.tag=sha-test >/tmp/tuist-kura-region-render.yaml

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