- Require Vita (soul-bound identity token) for minting restricted VTS
- Add age-restricted vendor flag for age-gated purchases (e.g., alcohol)
- Add IsAdultVerified method to PersonToken for age verification
- Update spend/canSpendAt to check age verification for restricted vendors
- Add toBool helper function for boolean stackitem parsing
- Add comprehensive tests for age-restricted functionality
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>