[FIX] Cache-buster ?v=20260613 sui JS/CSS modificati (help/common/common-bi/i18n/feedback/style/demo) + bump bug-reporter + demo assets

Risolve 'le modifiche non si vedono': /js/help.js era senza ?v -> browser serviva la versione cached
vecchia. 281 ref su 57 pagine + injection demo/bug-reporter aggiornate.

public/mktg-api-doc.html

@@ -4,7 +4,7 @@
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>NIS2 Agile — License API · Documentazione Marketing</title>
-<link rel="stylesheet" href="css/style.css">
+<link rel="stylesheet" href="css/style.css?v=20260613">
 <style>
 .doc-layout { max-width: 860px; margin: 0 auto; padding: 2rem 1.5rem; }
 .doc-hero {
@@ -411,6 +411,6 @@ curl https://nis2.agile.software/api/services/status</pre>
 </div>
 
 </div>
-<script src="js/common.js"></script>
+<script src="js/common.js?v=20260613"></script>
 </body>
 </html>