When a talosconfig uses a virtual IP or load balancer hostname (e.g., cluster.example.com) as the endpoint, and that same hostname appears in the nodes list, the Talos API would return empty results. This happened because the vIP/hostname was being passed in the gRPC node targeting header, but the Talos API only recognizes actual node IPs.

Modified TalosClient in crates/talos-rs/src/client.rs to:

• Store the original endpoints when creating the client
• Filter out any endpoint hostnames from the nodes list before sending requests
• Also filter out localhost addresses (127.0.0.1, localhost) which are never valid node targets

Also now respecting the KUBECONFIG environment variable.