Imports
Section 24.1 - The Bellman-Ford algorithm (legacy compatibility path)
Third-edition-numbered compatibility path for the Bellman-Ford algorithm. The canonical
fourth-edition source is
CLRSLean.FourthEdition.Chapter_22.Section_22_1_Bellman_Ford;
this module forwards to it so legacy imports keep working during the
compatibility period (see docs/migrations/clrs4.md).