Scaffold Extensions for Client Drift Mitigation in Federated Learning: A Synthesis of Approaches, Limitations, and Future Directions (James Mburu Muthii, Dr. Stephen Kahara Wanjau, & Dr. Stephen Njenga , Trans.). (2026). International Journal of Emerging Science and Engineering (IJESE), 14(4), 1-12. https://doi.org/10.35940/ijese.D2641.14040326