RAS 1.0.3

Resubmission addressing the CRAN reviewer’s comments on the 1.0.0 submission, with a bug fix folded in.

• Removed the \dontrun{} examples that called the unexported internal functions plot_ras_scan() and plot_ras_zoom_regions() through :::. These functions are internal (@keywords internal) and are already exercised by the runnable example of the exported plot() method for "ras" objects.
• Made the ras_memory() “abort” example runnable by wrapping the intentional stop() in try(), instead of hiding it in \dontrun{}.
• The plotting functions now capture the caller’s graphics parameters and restore them via an immediate on.exit(par(oldpar)), so plotting a "ras" object no longer leaves the user’s par() settings modified.
• Fixed a crash in screen_forward_max_region() (and therefore ras()) when covariates contained missing values. Incomplete cases are now dropped before the model matrix is built, matching the documented “removes incomplete cases” behaviour, on all three scan paths (continuous exact-FWL, binary score, and the legacy glm path).