chore(task): archive OSM turn lane arrows

.trellis/tasks/archive/2026-08/08-04-add-osm-turn-lane-arrows/task.json

@@ -3,7 +3,7 @@
   "name": "add-osm-turn-lane-arrows",
   "title": "Add OSM turn lane arrows",
   "description": "",
-  "status": "in_progress",
+  "status": "completed",
   "dev_type": null,
   "scope": null,
   "package": null,
@@ -11,7 +11,7 @@
   "creator": "dingkang",
   "assignee": "dingkang",
   "createdAt": "2026-08-04",
-  "completedAt": null,
+  "completedAt": "2026-08-05",
   "branch": null,
   "base_branch": "main",
   "worktree_path": null,