add ?utm_source=derez tracking to all outbound links across pages and blog posts

hosting.html

@@ -731,7 +731,7 @@
   <!-- ─── FOOTER ─── -->
   <footer>
     <p>
-      Built for <a href="https://hermes-agent.nousresearch.com">Hermes Agent</a> by
+      Built for <a href="https://hermes-agent.nousresearch.com?utm_source=derez">Hermes Agent</a> by
       <a href="https://derez.ai">Derez.ai</a> — managed Hermes hosting.
     </p>
     <p style="margin-top:8px;font-size:12px;">