Respect GUIDELLM__PREFERRED_ROUTE during backend validation #223
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Backend.validate()
always issued a smoke-test call to the legacy /v1/completions endpoint, even when the caller specifiedGUIDELLM__PREFERRED_ROUTE=chat_completions
. This breaks validation against deployments that expose only the chat-completions route.The PR makes backend validation honor the
GUIDELLM__PREFERRED_ROUTE
setting. Instead of always using the /v1/completions endpoint, it now chooses between text_completions and chat_completions based on the configured preference.