Comparative Study of Hypertension Prevalence, Health‐Related Quality of Life, and Healthcare Barriers Among Diabetic and Non‐Diabetic Populations in Urban Slums of Bangladesh: A Community‐Based Comparative Cross‐Sectional Study - Md. Fakhrul Islam Maruf; Nishat Tamanna Omi; Mahfuza Mubarak (Health Science Reports, 2026)