add local service proxy with .numa domains

HTTP reverse proxy on port 80 lets developers use clean domain names
(frontend.numa, api.numa) instead of localhost:PORT. Includes WebSocket
upgrade support for HMR, TCP health checks, dashboard UI panel, and
REST API for service management. numa.numa is preconfigured for the
dashboard itself.

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

src/lib.rs

@@ -8,9 +8,11 @@ pub mod forward;
 pub mod header;
 pub mod override_store;
 pub mod packet;
+pub mod proxy;
 pub mod query_log;
 pub mod question;
 pub mod record;
+pub mod service_store;
 pub mod stats;
 pub mod system_dns;