chore: align public-facing assets with cameleer.io

Replace personal/internal references in shipped artifacts ahead of
institutionalizing the product. registry.cameleer.io becomes the public
endpoint for the npm package and repository URL; gitea.siegeln.net
remains the internal CI publish target. Mock seed-admin renamed from
"Hendrik Siegeln" to "Ada Sterling" across pages, audit log, RBAC
mocks, and ui-mocks; Java exception namespace switched from
com.cameleer3 to io.cameleer in the route detail mock.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ui-mocks/mock-v3-exchange-detail.html

@@ -1439,8 +1439,8 @@ body {
       <div class="topbar-right">
         <span class="topbar-env">PRODUCTION</span>
         <div class="topbar-user">
-          <span>hendrik</span>
-          <div class="topbar-avatar">H</div>
+          <span>ada</span>
+          <div class="topbar-avatar">A</div>
         </div>
       </div>
     </div>