def needs_refresh(self) -> bool:
        """Check if the file URL needs to be refreshed (for Notion-hosted files)."""
        if self.file_type == "file" and self.expiry_time:
            from datetime import datetime, timezone

            return datetime.now(timezone.utc) >= self.expiry_time
        return False
Check if the file URL needs to be refreshed (for Notion-hosted files).
backend/airweave/platform/entities/notion.py