style(insights): run prettier on the metric stat strip

The formatter joins one JSX line that was left wrapped. No behaviour change.
It is the only thing standing between this branch and a green gate: typecheck,
tests, e2e, integration and both image builds already pass, and `format:check`
fails on this file alone.

src/components/insights/metric-stat-strip.tsx

@@ -207,9 +207,7 @@ function SeriesBlock({
         />
       ) : null}
       {description ? (
-        <p className="text-foreground text-sm leading-relaxed">
-          {description}
-        </p>
+        <p className="text-foreground text-sm leading-relaxed">{description}</p>
       ) : null}
       <div className="grid grid-cols-2 gap-x-3 gap-y-2 sm:grid-cols-4 [&>div]:min-h-[44px]">
         {cells.map((cell) => (