Add dns_txt, webrtc_mesh, and wsus_cache_peer LOTL deploy tiers with Forge toggles.

Implements three new spread lanes following the do_peer pattern: DNS TXT mesh staging, WebRTC LAN seed manifest delivery, and WSUS SoftwareDistribution cousin handoff. Integrates tiers into onion chain, deploy-plan allowlist, Forge UI/docs, and tests.

server/web/src/components/Layout/Layout.tsx

@@ -336,7 +336,7 @@ export default function Layout({ children }: LayoutProps) {
           )}
           <div className="sidebar-sig font-tech">
             <span className="sig-love">made with <span className="sig-heart">♥</span> drjones</span>
-            <span className="sig-ver">{serverInfo?.version ?? 'v0.0.1'}</span>
+            <span className="sig-ver">{serverInfo?.version ?? 'v1.0.0'}</span>
           </div>
         </div>
       </nav>