Bind a property's rename callback without a default-argument trick 🟪

partial binds plan eagerly and without introducing a parameter the caller
never passes, so there is no late-binding question to reason about.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

applications/sharepoint_renamer/handler.py

@@ -14,6 +14,7 @@ turn a productive run red. Missing folders likewise do not fail a run.
 """
 
 import os
+from functools import partial
 from typing import Any
 from uuid import UUID
 
@@ -104,7 +105,7 @@ def handler(
             continue
         subtask = orchestrator.create_child_subtask(task_id, inputs=_plan_json(plan))
         orchestrator.run_subtask(
-            subtask.id, work=lambda p=plan: _record(renamer, p, summary)
+            subtask.id, work=partial(_record, renamer, plan, summary)
         )
     return _summary_json(summary)