- Add held_left/held_right fields to CharacterData
- Add get/set_character_outfit and get/set_character_held_item to GameState
- get_save_data now returns version:2 with character_outfits and character_held_items
- apply_save_data resets both dicts when keys absent (empty-dict reset safe)
- 11 new tests in test_game_state.gd — 147/147 passing