Add dsl for outcome schemas (tables) for roqua

lib/quby/compiler/entities/subscore_schema.rb

@@ -14,6 +14,9 @@ module Quby
         attribute :only_for_export?, Types::Bool
         # [Optional] The key of the variable definition used to calculate the subscore result.
         attribute :calculation_key?, Types::Symbol
+        # [Optional argument] The name of the outcome table where this subscore should be shown. Used for cases where scores
+        # differ in subscores too much to be shown as one table. By default, all scores end up in the `:main` table.
+        attribute :outcome_table, Types::Symbol.default(:main).meta(omittable: true)
       end
     end
   end