v0.3.1

1, A pivot_energy configuration parameter has been added to most local empirical models. The default value is set to 1, indicating that the normalization parameter corresponds to the model value at 1 keV. Note that to maintain consistency with its original functional definition, the pivot_energy for the Band function defaults to 100 keV.
2, Support for local multiplicative-type models has been introduced. Currently, the available model in this category is hecut (high-energy cutoff model).
3, When generating posterior-related plots (such as corner plot or spectral plot), the package now defaults to using the global best-fit parameters rather than the best-fit parameters within the 1sigma confidence interval. Additionally, a new parameter, at_par, has been introduced to allow manual selection of the parameter type. Supported options include: "best", "best_ci", "median", "mean".