Add the channel server on loop.sock

Implemented-By: OpenCode session (model recorded in docs/implementer-log.md)

crates/loopd/src/lib.rs

@@ -1,6 +1,7 @@
 //! The agent loop: sessions, prompt assembly and memory. It holds no authority.
 
 pub mod baseline;
+pub mod channel;
 pub mod config;
 pub mod http;
 pub mod llama;