- Add ItemRarity enum with 5 tiers (common, uncommon, rare, epic, legendary)
- Add rarity field to Item dataclass with COMMON default
- Update Item serialization (to_dict/from_dict) for rarity
- Export ItemRarity from models package
- Add 24 comprehensive unit tests for Item and ItemRarity
Part of Phase 4 Week 2: Inventory & Equipment System (Task 2.1)
Add new Luck stat to the character stats system with class-specific values:
- Assassin: 12 (highest - critical specialists)
- Luminary: 11 (divine favor)
- Wildstrider/Lorekeeper: 10 (average)
- Arcanist/Oathkeeper: 9 (modest)
- Vanguard: 8 (default - relies on strength)
- Necromancer: 7 (lowest - dark arts cost)
Changes:
- Add luck field to Stats dataclass with default of 8
- Add LUCK to StatType enum
- Update all 8 class YAML files with luck values
- Display LUK in character panel (play page) and detail page
- Update DATA_MODELS.md documentation
Backward compatible: existing characters without luck default to 8.
