fix(module-loader): register cert-manager in MODULE_REGISTRY

cert-manager was seeded and activated in the DB but missing from the
frontend whitelist, causing the dynamic route to always show "module
not found".

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/lib/module-loader.ts

@@ -41,6 +41,12 @@ export const MODULE_REGISTRY: Record<string, ModuleRegistryEntry> = {
       { ssr: false },
     ),
   },
+  'cert-manager': {
+    component: dynamic(
+      () => import('@/app/(portal)/modules/cert-manager/page'),
+      { ssr: false },
+    ),
+  },
 };
 
 /**