daemon: add support for getting messages from db

kordophone-db/src/tests/mod.rs

@@ -310,6 +310,10 @@ async fn test_insert_messages_batch() {
                 ),
             }
         }
+
+        // Make sure the last message is the last one we inserted
+        let last_message = repository.get_last_message_for_conversation(&conversation_id).unwrap().unwrap();
+        assert_eq!(last_message.id, message4.id);
     })
     .await;
 }