Case C-309/24 P: Judgment of the Court (Sixth Chamber) of 5 March 2026 – Roberto Passalacqua v European Commission (Appeal – Civil service – Official – Promotion – 2021 promotion exercise – Decision not to promote the applicant to grade AD 11 – Article 45(1) of the Staff Regulations – Comparison of merits – Obligation to state reasons – Allocation of the burden of proof)