Record stroke draw samples callback extraction

docs/modernization/debt.md

@@ -320,6 +320,11 @@ agent or engineer to remove them without reconstructing context from chat.
   request assembly now routes through `make_stroke_draw_samples_request(...)`;
   the retained path still owns the concrete destination-copy dispatch and
   brush upload/draw wiring.
+- 2026-06-13: DEBT-0036 was narrowed again. `Canvas::stroke_draw_samples()`
+  destination-texture dispatch now routes through
+  `make_stroke_draw_samples_destination_texture_dispatch(...)`; the retained
+  path still owns the concrete destination-copy callback wiring and request
+  execution.
 - 2026-06-13: DEBT-0036 was narrowed again. `Canvas::stroke_draw_samples()`
   now routes polygon triangulation, sample-point assembly, and retained
   destination-copy / upload / draw helper handoff through