NVKE v0.23.1 Tightens Tenant Kubeconfig Parsing

This is a narrow maintenance release, but it targets a high-leverage control-plane boundary in a platform designed to provision isolated Kubernetes clusters on NVIDIA bare metal.

• –The sole code change tightens tenant kubeconfig parsing through an explicit allowlist.
• –Dependency digests cover Temporal, PostgreSQL, SPIRE, and related bootstrap components, improving deployment reproducibility.
• –NVKE manages cluster creation, scaling, upgrades, node replacement, identity, and encryption across GPU infrastructure. [NVKE documentation](https://docs.nvidia.com/nvke/documentation/overview/what-is-nvke)
• –Operators should still treat v0.23.1 as preview software; NVIDIA does not recommend production workloads, and API authentication must be configured before exposing the service. [Preview limitations](https://docs.nvidia.com/nvke/documentation/overview/preview-status-and-known-limitations)
• –An independent review confirmed the repository builds and tests cleanly, but did not validate full cluster provisioning. [Review](https://mrkeyoor.com/repos/nvke/)