Record STR-032 closeout hash

docs/modernization/debt.md

@@ -286,6 +286,10 @@ agent or engineer to remove them without reconstructing context from chat.
   paint branch now routes through `draw_merge_temporary_paint_branch(...)`;
   the retained path still owns the concrete temporary-paint setup, texture
   binding, and draw ordering.
+- 2026-06-13: DEBT-0036 was narrowed again. `Canvas::draw_merge()` remaining
+  branch orchestration now routes through `draw_merge_branch_orchestration(...)`;
+  the retained path still owns the concrete per-branch framebuffer, sampler,
+  and texture wiring.
 - 2026-06-13: DEBT-0036 was narrowed again. `Canvas::stroke_draw()` main-pass
   live face orchestration now routes through
   `execute_legacy_canvas_stroke_live_pass_with_face_framebuffers(...)`; the