Create a presentation-ready Slidev deck for IT operations and security engineers that explains zero-trust architecture, with a strong focus on identity verification. Keep it technical and straightforward, use the default theme, and aim for about 10 slides. I want the audience to leave with a clear mental model of what must be verified on each access request, how policy decisions are made, and what an operational rollout looks like. Use visuals only where they clarify the architecture or flow.