Move stroke preview render mapping to renderer gl

docs/modernization/build-inventory.md

@@ -189,6 +189,9 @@ Known local toolchain state:
   Legacy `util.cpp` OpenGL error naming and `gl_state` save/restore also
   consume backend-owned error codes, state queries, framebuffer targets,
   texture binding targets, and active texture units.
+  `NodeStrokePreview` brush preview rendering also consumes backend-owned
+  depth/scissor/blend state, viewport/clear-color queries, active texture
+  units, 2D texture targets, copy targets, and sampler filters/wraps.
 - `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.