31.4. Solving Modular Linear Equations (legacy compatibility path)
Third-edition-numbered compatibility path for this module. The canonical
fourth-edition source is
CLRSLean.FourthEdition.Chapter_31.Section_31_4_Solving_Modular_Linear_Equations;
this module forwards to it so legacy imports keep working during the
compatibility period (see docs/migrations/clrs4.md).