Add Plausible analytics snippet to odoo-hosting-2027.html <head>

Reuses the exact snippet shipped on index.html in 6bb529a, inserted
verbatim as the last thing in <head> (before </head>). Diff is this
file only; the ld+json @graph block is byte-identical.

odoo-hosting-2027.html

@@ -526,6 +526,12 @@
         ]
       }
     </script>
+  <!-- Privacy-friendly analytics by Plausible -->
+<script async src="https://plausible.office.odoo4projects.com/js/pa-NhA7Rf-79VopXFQXhSS4e.js"></script>
+<script>
+  window.plausible=window.plausible||function(){(plausible.q=plausible.q||[]).push(arguments)},plausible.init=plausible.init||function(i){plausible.o=i||{}};
+  plausible.init()
+</script>
   </head>
   <body>
     <!-- Page-scoped top bar: the site has no global header, so the page carries its own way home. -->