Copy-paste ready steps to validate the Direct vLLM provider end-to-end. Every example
uses namespace vllm-test — change it once in Setup and the rest follow.
Field names match controller/api/v1alpha1/modeldeployment_types.go, the sample
controller/config/samples/airunway_v1alpha1_modeldeployment.yaml, and docs/providers/vllm.md.
The provider default image is vllm/vllm-openai:cu130-nightly; the server, Service, and probes
are hard-wired to 0.0.0.0:8000.