Section 25.2 - The Floyd-Warshall algorithm (legacy compatibility path)
Third-edition-numbered compatibility path for the Floyd-Warshall algorithm. The canonical
fourth-edition source is
CLRSLean.FourthEdition.Chapter_23.Section_23_2_Floyd_Warshall;
this module forwards to it so legacy imports keep working during the
compatibility period (see docs/migrations/clrs4.md).