chore(task): archive 08-17-native-rounded-junctions

.trellis/tasks/archive/2026-08/08-17-native-rounded-junctions/prd.md

@@ -17,12 +17,19 @@ road-edge corners for ordinary Nantaizi T and cross junctions.
 
 ## Acceptance Criteria
 
-- [ ] Ordinary cross/T fixtures generate rounded junction polygons with more
+- [x] Ordinary cross/T fixtures generate rounded junction polygons with more
   than the prior eight straight boundary vertices and `boundary_mode` records
   the chosen style.
-- [ ] Connector containment remains valid and degenerate geometry falls back
+- [x] Connector containment remains valid and degenerate geometry falls back
   without publishing self-intersecting polygons.
-- [ ] Nantaizi compile/check and native Blender/Cesium/preview succeed.
+- [x] Nantaizi compile/check and native Blender/Cesium/preview succeed.
+
+## Verification Record
+
+- Native geometry and Workbench tests passed.
+- Nantaizi native compile/check passed with `ok=true`.
+- Native Blender/Cesium/preview verification was completed manually in a
+  working Blender environment.
 
 ## Notes
 

.trellis/tasks/archive/2026-08/08-17-native-rounded-junctions/task.json

@@ -3,7 +3,7 @@
   "name": "native-rounded-junctions",
   "title": "Rounded native road junctions",
   "description": "",
-  "status": "in_progress",
+  "status": "completed",
   "dev_type": null,
   "scope": null,
   "package": null,
@@ -11,7 +11,7 @@
   "creator": "dingkang",
   "assignee": "dingkang",
   "createdAt": "2026-08-17",
-  "completedAt": null,
+  "completedAt": "2026-08-18",
   "branch": null,
   "base_branch": "feature/native-road-compiler",
   "worktree_path": null,