Record STR-052 closeout hash

docs/modernization/debt.md

@@ -18,6 +18,10 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Recent Reductions
 
+- 2026-06-14: `DEBT-0036` was narrowed again. `execute_canvas_draw_merge_plane_iteration()`
+  now routes the per-plane dispatch wrapper through
+  `execute_canvas_draw_merge_plane_dispatch(...)`; the plane loop still owns
+  the plane-selection guard and helper dispatch.
 - 2026-06-14: `DEBT-0036` was narrowed again. `execute_canvas_draw_merge_branch_body()`
   now routes the branch dispatch object assembly through
   `make_canvas_draw_merge_branch_dispatch(...)`; the branch body still owns the

docs/modernization/tasks.md

@@ -2202,7 +2202,7 @@ ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_composito
 
 ### STR-052 - Extract Draw Merge Per-Plane Dispatch Wrapper
 
-Status: Ready
+Status: Done
 Score: no score movement
 Debt: `DEBT-0036`
 Scope: `src/canvas.cpp`, `src/legacy_canvas_draw_merge_services.h`, `tests/paint_renderer/compositor_tests.cpp`
@@ -2222,6 +2222,8 @@ Done Checks:
 - `docs/modernization/debt.md` records the reduced draw-merge plane-dispatch
   surface.
 
+Closeout: `e8fe66da`
+
 Validation:
 
 ```powershell