feat: leveling system

migration.sql

@@ -0,0 +1,31 @@
+-- 1) Ensure the new table exists
+CREATE TABLE IF NOT EXISTS levelrewards (
+  guild_id BIGINT NOT NULL,
+  levelreq INT NOT NULL,
+  role BIGINT NOT NULL,
+  PRIMARY KEY (guild_id, levelreq)
+);
+
+-- 2) Backfill from legacy columns (only rows that have both values)
+INSERT INTO levelrewards (guild_id, levelreq, role)
+SELECT guild_id, levelreq, role
+FROM levelsettings
+WHERE role IS NOT NULL
+  AND levelreq IS NOT NULL
+ON CONFLICT (guild_id, levelreq)
+DO UPDATE SET role = EXCLUDED.role;
+
+SELECT
+  (SELECT COUNT(*)
+   FROM levelsettings
+   WHERE role IS NOT NULL AND levelreq IS NOT NULL) AS legacy_reward_rows,
+  (SELECT COUNT(*)
+   FROM levelrewards) AS levelrewards_rows;
+
+   SELECT ls.guild_id, ls.levelreq, ls.role
+FROM levelsettings ls
+LEFT JOIN levelrewards lr
+  ON lr.guild_id = ls.guild_id AND lr.levelreq = ls.levelreq
+WHERE ls.role IS NOT NULL
+  AND ls.levelreq IS NOT NULL
+  AND lr.guild_id IS NULL;