Imports

27.3. P-MERGE (legacy compatibility path)

Third-edition-numbered compatibility path for this module. The canonical fourth-edition source is CLRSLean.FourthEdition.Chapter_26.Section_26_2_4_Algorithms.ParallelMerge.PMerge; this module forwards to it so legacy imports keep working during the compatibility period (see docs/migrations/clrs4.md).