QhX: A Python package for periodicity detection in red noise. - Andjelka Kovacevic; Dragana Ilic; Momcilo Tosic; Marina Pavlovic; Aman Raju; Mladen Nikolic; Sasa Simic; Iva Cvorovic-Hajdinjak; Luka C. Popovic (J. Open Source Softw., 2026)