RustyLee: Adds organ ID to brain messages

Includes a unique identifier for the sending organ in `BrainMessage`.
Enables the Brain to differentiate and respond appropriately to messages from various organs.
Refactors `Brain` method for clearer communication flow.

src/rustylee/src/brain.rs

@@ -52,7 +52,7 @@ impl Brain {
             }
 
             while let Ok(message) = self.organ_rx.try_recv() {
-                self.process_organ_message(message);
+                self.process_message_from_organ(message);
             }
 
             self.rest();
@@ -153,8 +153,8 @@ impl Brain {
             self.state != Buried
     }
 
-    fn process_organ_message(&mut self, message: BrainMessage) {
-        debug!("organ message received: {:?}", message);
+    fn process_message_from_organ(&mut self, message: BrainMessage) {
+        debug!("organ message received: {:?}.", message);
         if let OrganCommand::Waken = message.organ_command.command {
             self.state = LifeState::Awake;
         }

src/rustylee/src/organs/heart.rs

@@ -76,6 +76,7 @@ impl Heart {
         let reply = BrainMessage {
             organ_command: command_envelope,
             responded_at: Time::time_stamp_millis(),
+            organ_id: self.id,
             response,
         };
 

src/rustylee/src/protocols.rs

@@ -33,5 +33,6 @@ pub struct OrganCommandEnvelope {
 pub struct BrainMessage {
     pub organ_command: OrganCommandEnvelope,
     pub responded_at: u64,
+    pub organ_id: u32,
     pub response: OrganResponse,
 }