MAPG-235 challengeInitialData implemented and first round is loaded

database/migrations/structure/20210510_2000_challenge.sql

@@ -13,7 +13,7 @@ CREATE TABLE `user_in_challenge` (
   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
   `user_id` int(10) unsigned NOT NULL,
   `challenge_id` int(10) unsigned NOT NULL,
-  `round` smallint(5) signed NOT NULL DEFAULT -1,
+  `round` smallint(5) signed NOT NULL DEFAULT 0,
   `score` int(10) unsigned NOT NULL DEFAULT 0,
   `time_left` int(10) unsigned,
   `is_owner` tinyint(1) NOT NULL DEFAULT 0,