Record GPU Eevee graphics verification and clarify unsupported runtime errors

Configure GPU Eevee defaults and verify graphics backends across ZeroGPU sizes

Add GPU Eevee capability test and clarify independent engine/device choices

Default to CPU Eevee; retain optional GPU/Cycles and fix inherited task locks

Record verified ZeroGPU CUDA rendering and improve client timeout

Bundle verified Blender runtime to fix startup download 403

Deploy Blender Render Studio with Gradio API and MCP