fix passing ts to db

yamldb.go

@@ -71,6 +71,7 @@ func (db yamlDB) PushAnswer(user, q, a string, pass bool) error {
 	db.Users[user].History[q] = append(db.Users[user].History[q], History{
 		A:    uuid,
 		Pass: pass,
+		TS:   db.Knowledge.Answers[uuid].TS,
 	})
 	return nil
 }