SEKOUR v. FRANCE - 52496/19 (Art 35 s 1 - Exhaustion of domestic remedies - Effective preventive remedies in relation to the extension of solitary confinement for protection or security reasons: summary suspensions and summary proceedings - Art 3 (material) - Inhuman and degrading treatment : Remainder inadmissible : Fifth Section) French Text [2026] ECHR 45 (12 March 2026)