fix(portal-admin): adr refs point at gitea, not the madr template repo

`audit.html` and `users.html` cited ADR-0013 / ADR-0020 with anchors
pointing at `https://github.com/adr/madr` — that's the MADR _template_
repository, not our ADRs. Copy-paste artifact from the original
authoring.

Both links now resolve to the actual ADR file on Gitea
(`https://git.unespace.com/julien/apf_portal/src/branch/main/docs/decisions/…`)
so a reviewer who clicks lands on the right document. Surfacing the
ADRs inside portal-admin is intentionally out of scope — the audience
(APF internal admins, not architects) doesn't justify the
markdown-rendering + BFF-filesystem coupling cost; a separate static-
site for docs is a better fit and lands as its own chantier.

apps/portal-admin/src/app/pages/audit/audit.html

@@ -3,9 +3,13 @@
     <h1 class="title">Audit log</h1>
     <p class="intro">
       Read-only view of <code>audit.events</code> per
-      <a href="https://github.com/adr/madr" rel="noopener" target="_blank">ADR-0013</a>. Every query
+      <a
-      run on this page emits its own <code>admin.audit.query</code> row — read access is itself
+        href="https://git.unespace.com/julien/apf_portal/src/branch/main/docs/decisions/0013-audit-trail-separated-postgres-append-only.md"
-      auditable.
+        rel="noopener"
+        target="_blank"
+        >ADR-0013</a
+      >. Every query run on this page emits its own <code>admin.audit.query</code> row — read access
+      is itself auditable.
     </p>
   </header>
 

apps/portal-admin/src/app/pages/users/users.html

@@ -3,9 +3,13 @@
     <h1 class="title">Users</h1>
     <p class="intro">
       Read-only directory of every identity that has signed in to portal-shell or portal-admin per
-      <a href="https://github.com/adr/madr" rel="noopener" target="_blank">ADR-0020</a>. Every query
+      <a
-      run on this page emits an <code>admin.users.query</code> audit row — directory access is
+        href="https://git.unespace.com/julien/apf_portal/src/branch/main/docs/decisions/0020-portal-admin-app.md"
-      itself auditable.
+        rel="noopener"
+        target="_blank"
+        >ADR-0020</a
+      >. Every query run on this page emits an <code>admin.users.query</code> audit row — directory
+      access is itself auditable.
     </p>
   </header>