Add Metrics tab with historical server utilization and map capacity

src/routes/metrics/+page.server.ts

@@ -0,0 +1,7 @@
+import { readMetrics } from '$lib/server/fleet/metrics.js';
+import type { PageServerLoad } from './$types';
+
+export const load: PageServerLoad = ({ url }) => {
+    const requested = Number(url.searchParams.get('days') ?? 7);
+    return readMetrics([1, 7, 30].includes(requested) ? requested : 7);
+};