Add three new continuous random variables for log-domain and
linear-domain clutter modeling with compound Gamma-Rice structure.
Fix numerical stability of k_dist._logpdf and logk._log_kve via a
three-regime log(kve) asymptotic (direct / large-z Hankel / large-order
Gamma); replace quad-based k_dist._cdf with Gauss-Laguerre quadrature.
Fix fitter: use np.asarray instead of np.abs in fit(), pass fit_params
to goodness_of_fit so the observed-data statistic reuses fitted params.
Skip non-finite quantiles in QQ plots. Add plot_qq_plots_sns(); rename
histogram_with_fits_seaborn() to histogram_with_fits_sns(). Add unit
tests for logweibull and logricegamma.
