Move VR render state mapping to renderer gl

docs/modernization/build-inventory.md

@@ -199,6 +199,9 @@ Known local toolchain state:
   The Windows entrypoint also consumes backend-owned generic OpenGL error-code
   and info-string tokens; WGL context/pixel-format constants remain in the
   platform shell for a later platform-boundary slice.
+  Desktop VR drawing also consumes backend-owned scissor/depth/blend state,
+  depth clear masks, active texture units, and fallback 2D texture unbind
+  targets while retaining the existing VR SDK/platform bridge shape.
 - `windows-msvc-vcpkg-headless` validates manifest install/configure/build/test
   for the current headless component matrix; see DEBT-0007 for remaining app
   and platform triplet migration.