Deleting user via API vs keeping interaction history

Running a DELETE on /api/v2/users/{userId} wipes the user record clean, but I need to keep their historical interactions linked for reporting. The docs hint at deactivation, but I can’t find a specific endpoint or JSON payload that soft-deletes the user while preserving the foreign key references in the interaction logs. Is there a flag in the PATCH request or a separate API call I’m missing?