fix: output the history as ghtree

Author: DamienGilliard

src/gh/components/DF_main_pc_axes/code.py

@@ -53,4 +53,4 @@ def RunScript(self,
         if i_save:
             all_poses_in_time.add_step(all_poses_this_time)
 
-        return [planes, all_poses_in_time]
+        return [planes, all_poses_in_time.to_gh_tree()]