api!: AE work

BREAKING CHANGE
this commit is to mark the major work of AntiEntropy.

src/routing/core/mod.rs

@@ -108,6 +108,8 @@ impl Core {
         sender: Option<SocketAddr>,
     ) -> Result<(Vec<Command>, bool)> {
         if !self.is_elder() {
+            // Adult nodes do need to carry out entropy checking, however the message shall always
+            // be handled.
             return Ok((vec![], true));
         }
 

src/routing/mod.rs

@@ -532,9 +532,7 @@ async fn handle_message(dispatcher: Arc<Dispatcher>, bytes: Bytes, sender: Socke
             msg: _,
             dest_info: _,
             src_section_pk: _,
-        } => {
-            unimplemented!()
-        }
+        } => unimplemented!(),
         MessageType::Client { msg, dest_info } => {
             let end_user = dispatcher
                 .core