Deploys the Go gRPC gateway and Python/libtorch inference sidecar as one
pod on nik-gpu (nodeSelector/toleration/runtimeClassName: nvidia, sidecar
requesting nvidia.com/gpu: 1), matching the existing GPU device plugin.
Model checkpoint/config are bind-mounted from /data/tts-gateway, added to
gpu-node's Ansible data_dirs for consistency with the other hosts.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
