Log activity history and better logging of latest activity

Created by: will-malisch

src/activity.py

@@ -86,8 +86,4 @@ class Activity:
             return False
 
     def get_latest_activity(self):
-        return self.db_client.get_latest_activity()
-
-    def list_activities(self):
-        # TODO
-        return 
\ No newline at end of file
+        return self.db_client.get_latest_activity()
\ No newline at end of file