daemon: maintain outgoing message reference so model is consistent

kordophone/src/model/outgoing_message.rs

@@ -1,5 +1,6 @@
 use serde::Serialize;
 use super::conversation::ConversationID;
+use chrono::NaiveDateTime;
 use uuid::Uuid;
 
 #[derive(Debug, Clone, Serialize)]
@@ -7,6 +8,9 @@ pub struct OutgoingMessage {
     #[serde(skip)]
     pub guid: Uuid,
 
+    #[serde(skip)]
+    pub date: NaiveDateTime,
+
     #[serde(rename = "body")]
     pub text: String,
 
@@ -62,6 +66,7 @@ impl OutgoingMessageBuilder {
             text: self.text.unwrap(), 
             conversation_id: self.conversation_id.unwrap(), 
             file_transfer_guids: self.file_transfer_guids.unwrap_or_default(),
+            date: chrono::Utc::now().naive_utc(),
         }
     }
 }