Add autoscaling dry run and policy controls

src/routes/metrics/+page.svelte

@@ -108,7 +108,7 @@
 <svelte:head><title>Metrics · Electric Cherry</title></svelte:head>
 
 <div class="page">
-    <SectionHeader title="Metrics" />
+    <SectionHeader title="Metrics">{#snippet actions()}<Button href="/autoscaling">Autoscaling</Button>{/snippet}</SectionHeader>
     <div class="toolbar">
         <nav aria-label="Metrics time range">
             {#each [1, 7, 30] as days}