Added Release Notes for 4th April

src/pages/docs/release-notes.mdx

@@ -3,6 +3,25 @@ title: "Release Notes"
 description: "Latest Future AGI release notes covering new features, improvements, and bug fixes across datasets, evaluations, simulation, and observability products."
 ---
 
+## Week of 2026-04-07
+
+<div class="mb-12 pb-8 border-b border-[var(--color-border-subtle)] last:border-b-0">
+
+<div class="mt-6 mb-3 text-lg font-semibold">Features</div>
+- **Voice AI: Production-to-Simulation:** You can now take any production voice call and turn it directly into a simulation test case. Run different prompt versions against it and compare results. This lets you test against real inputs without having to reproduce call scenarios manually.
+
+<div class="mt-6 mb-3 text-lg font-semibold">Bugs/Improvements</div>
+
+- **Annotation Queue:** You can now manually assign specific items to any user who can annotate. Reviewer approval is optional - you can turn it on or off depending on your workflow.
+
+- **Prompt Diff:** The prompt diff view has been improved to show line-by-line changes when comparing two versions. The diff is now easier to read and follow.
+
+- **Voice Metrics in Call Lists:** New voice metrics are now added as columns in the call list. In the observe view, these show up for both live and simulation calls and you can toggle between the two to filter which ones you see.
+
+- **API Docs:** The API reference is now easier to read. Each endpoint page now shows the curl example and response alongside all the details you need, so everything is visible on one page without scrolling.
+
+</div>
+
 ## Week of 2026-03-26
 
 <div class="mb-12 pb-8 border-b border-[var(--color-border-subtle)] last:border-b-0">