docs: def run_stats_df(self):
          """Returns self.run_stats over search params as pandas dataframe."""
  
          run_stats_df = []
          for x in self.run_stats:
              search_results = {**x["search_params"]}
              search_results["score"] = x["score"]
              run_stats_df.append(search_results)
          return pd.DataFrame(run_stats_df)