def _is_supported(self, file_path: str) -> bool:
        """Check if the file extension is supported."""
        ext = Path(file_path).suffix.lower()
        if ext not in self.SUPPORTED_EXTENSIONS:
            logger.warning(f"Unsupported file extension: {ext} for file: {file_path}")
            return False
        return True
Check if the file extension is supported.
backend/airweave/platform/file_handling/async_markitdown.py