Whether GPU frame-time measurement is available on this engine's device — i.e. the adapter offered
the WebGPU timestamp-query feature (requested opportunistically by createEngine). When false,
setGpuTimingEnabled is a no-op and EngineContext.gpuFrameTimeMs stays 0.
Whether GPU frame-time measurement is available on this engine's device — i.e. the adapter offered the WebGPU
timestamp-queryfeature (requested opportunistically by createEngine). When false, setGpuTimingEnabled is a no-op and EngineContext.gpuFrameTimeMs stays 0.