Route stroke face sample ordering through helper

docs/modernization/roadmap.md

@@ -3104,6 +3104,10 @@ Results:
   the retained stroke execution helper, while framebuffer binding, shader
   uniform timing, sampler/texture binding, and live draw execution remain
   retained.
+- `Canvas::stroke_draw` current and dual stroke per-face framebuffer/sample
+  callback ordering now shares the retained stroke execution helper, while
+  framebuffer ownership, shader uniform timing, sampler/texture binding, and
+  live draw execution remain retained.
 - Remaining simple color, hue, color-quad, grid heightmap, and pen/line
   preview shader setup in UI nodes and canvas modes now shares retained helper
   surfaces, while geometry, texture/sampler binding, blend/depth state,