Refactor code to remove trailing whitespace and improve readability

- Cleaned up trailing whitespace in `games_controller.rb`, `game.rb`, and `validate_scenario.rb` to enhance code quality and maintain consistency across the codebase.
- Updated migration file `remove_unique_game_constraint.rb` to remove unnecessary whitespace, ensuring a cleaner migration history.
- Improved overall readability of the code by eliminating redundant blank lines in various files.

db/migrate/20251128000001_remove_unique_game_constraint.rb

@@ -16,8 +16,3 @@ class RemoveUniqueGameConstraint < ActiveRecord::Migration[7.0]
               name: 'index_games_on_player_and_mission_non_unique'
   end
 end
-
-
-
-
-

scripts/validate_scenario.rb

@@ -529,7 +529,6 @@ def check_recommended_fields(json_data)
         room['objects'].each_with_index do |obj, idx|
           path = "rooms/#{room_id}/objects[#{idx}]"
           warnings << "Missing recommended field: '#{path}/observations' - helps players understand what items are" unless obj.key?('observations')
-          
         end
       end
 
@@ -738,4 +737,3 @@ def main
 end
 
 main if __FILE__ == $PROGRAM_NAME
-