fix(dashboard): address observability review findings

src/lib/ui/model-renderer.test.ts

@@ -25,6 +25,9 @@ describe("dashboard model renderer", () => {
     expect(dashboard.serviceGroups.map((group) => group.id)).toEqual(
       dimensionLabDashboardFixture.layout.serviceGroups,
     );
+    expect(dashboard.serviceGroups.find((group) => group.id === "runtime-health")?.layout).toBe(
+      "grid",
+    );
     expect(dashboard.modules.map((module) => module.id)).toEqual([
       "weather-amsterdam",
       "runtime-health-summary",