Method log

src/post_training/logging_utils.py:46–51

(self, step: int, metrics: dict[str, Any])

        print(f"[logger] stage={stage} -> {self.path}")

    def log(self, step: int, metrics: dict[str, Any]) -> None:
        record = {"step": step, "wall": time.time(), **metrics}
        self._fh.write(json.dumps(record) + "\n")
        self._fh.flush()
        if self._wandb is not None:
            self._wandb.log(metrics, step=step)

    def close(self) -> None:
        try: