Improve rpc api return objects encoding

Signed-off-by: Lee Smet <lee.smet@hotmail.com>

src/models/message.rs

@@ -5,7 +5,7 @@ use crate::{
     time::Timestamp,
 };
 
-#[derive(Serialize, Deserialize)]
+#[derive(Clone, Serialize, Deserialize)]
 pub struct Message {
     /// Unique ID for the message, set by the caller
     id: u32,
@@ -29,14 +29,14 @@ pub struct Message {
     status: MessageStatus,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum MessageType {
     Job,
     Chat,
     Mail,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum MessageStatus {
     Dispatched,
     Acknowledged,
@@ -44,7 +44,7 @@ pub enum MessageStatus {
     Processed,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum MessageFormatType {
     Html,
     Text,