import logging
import sys


def configure_logging(level: int = logging.INFO) -> None:
    """Configure root logger once per process."""
    if getattr(configure_logging, "_configured", False):
        return
    handler = logging.StreamHandler(sys.stdout)
    fmt = (
        "%(asctime)s | %(levelname)s | %(name)s | %(message)s"
    )
    handler.setFormatter(logging.Formatter(fmt))
    root = logging.getLogger()
    root.setLevel(level)
    root.addHandler(handler)
    configure_logging._configured = True