Scraper fixes:
- Detect fossil cards (Helix/Dome Fossil, Old Amber) as Trainer/Item cards
- Add text artifact cleaning for stripped energy icons:
- 'aEnergy' -> 'an Energy'
- 'extraEnergy' -> 'extra Energy'
- 'BenchedPokémon' -> 'Benched Pokémon'
- And 20+ other common patterns
Converter improvements:
- Add evolution chain validation to detect broken evolves_from references
- Track conversion errors and validation warnings in _index.json
- Return errors from convert_set() for better debugging
Data fixes:
- Fixed 4 fossil cards (now correctly typed as trainer/item)
- Fixed text artifacts in 46 raw card files
- Regenerated all 382 card definitions
- All evolution chains now valid
Added fix_raw_text.py utility script for batch text cleanup.
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