added contest team member limit (#202)

Author: konpoku

migrations/1750137516085_alter_table_public_contest_add_column_max_teammember_limit/down.sql

@@ -0,0 +1,4 @@
+-- Could not auto-generate a down migration.
+-- Please write an appropriate down migration for the SQL below:
+-- alter table "public"."contest" add column "max_teammember_limit" Integer
+--  null;

migrations/1750137516085_alter_table_public_contest_add_column_max_teammember_limit/up.sql

@@ -0,0 +1,2 @@
+alter table "public"."contest" add column "max_teammember_limit" Integer
+ null;