FuriosaAI developer documentation (furiosa-llm serving guide)

Vendor developer docs for the furiosa-llm package: `furiosa-llm serve <model>` exposes an OpenAI-compatible endpoint on the RNGD (Renegade) NPU. Cited by the Oct-14 exotic-silicon research brief as evidence the serving stack is real while the hardware stays request-access/eval-only. No public tok/s table is published there. Vendor documentation, not an independent measurement.