Imports
29.2. Multicommodity Flow as an LP (legacy compatibility path)
Third-edition-numbered compatibility path for this module. The canonical
fourth-edition source is
CLRSLean.FourthEdition.Chapter_29.Section_29_2_Formulating_Problems_As_Linear_Programs.MulticommodityFlow;
this module forwards to it so legacy imports keep working during the
compatibility period (see docs/migrations/clrs4.md).