chore: improve seo

Author: samber

site/public/robots.txt

@@ -1,9 +1,5 @@
 User-agent: *
 Allow: /
-Disallow: /awesome-prometheus-alerts/rules.html
-Disallow: /awesome-prometheus-alerts/alertmanager.html
-Disallow: /awesome-prometheus-alerts/blackbox-exporter.html
-Disallow: /awesome-prometheus-alerts/sleep-peacefully.html
 
 # AI search bots — explicitly allowed for citation
 User-agent: GPTBot

site/src/pages/rules/[group]/[service].astro

@@ -104,8 +104,6 @@ const jsonLd = {
 
       <!-- Main content -->
       <div class="flex-1 min-w-0">
-        <CautionBanner />
-
         <!-- Page header -->
         <div class="mb-6 pb-6 border-b border-slate-200 dark:border-slate-800">
           <h1 class="text-2xl font-bold text-slate-900 dark:text-white mb-2">{service.name} Prometheus Alert Rules</h1>
@@ -116,6 +114,8 @@ const jsonLd = {
           </p>
         </div>
 
+        <CautionBanner />
+
         <!-- Exporters -->
         {service.exporters.map((exporter, expIdx) => (
           <ExporterSection