Section 2.2 - Analyzing algorithms (legacy compatibility path)
Third-edition-numbered compatibility path for the insertion-sort worst-case
comparison count. The canonical fourth-edition source is
CLRSLean.FourthEdition.Chapter_02.Section_02_2_Analyzing_Algorithms;
this module forwards to it so legacy imports keep working during the
compatibility period (see docs/migrations/clrs4.md).