Testing CI

asahi/apple9: document native VDM storage and coherency

Document direct command-buffer allocation, context-relative links, mapped fetch tails and the render-batch barrier. Preserve the snapshot's recorded hardware evidence and distinguish the observed overread hazard from an unmeasured fetch width.

Validation: Asahi compiler, layout, geometry, launcher and GLSL function-scope tests. Gallium, EGL, DRM shim, GLSL compiler and compute runner builds; GLES fixture compiled with -Werror. No hardware run for this snapshot split.

Assisted-By: OpenAI Codex (GPT-6 Astra)