Wire stroke commit service boundary

docs/modernization/debt.md

@@ -178,6 +178,10 @@ agent or engineer to remove them without reconstructing context from chat.
   `execute_legacy_canvas_draw_merge_layer_composite(...)`; the retained path
   still owns the concrete temporary-stroke, layer-texture, and layer-blend
   callback bodies.
+- 2026-06-13: DEBT-0036 was narrowed again. `Canvas::stroke_commit()` now
+  routes the remaining service wiring through `make_canvas_stroke_commit_request(...)`;
+  the retained path still owns the concrete history mutation and layer dirty
+  box updates.
 - 2026-06-13: DEBT-0036 was narrowed again. `Canvas::stroke_commit()` now
   builds its retained callback table through
   `make_legacy_canvas_stroke_commit_callbacks(...)`; the legacy executor still