Implements RoleRegistry as a native contract for role-based access control
that integrates with PersonToken for democratic governance.
Key features:
- Built-in roles: COMMITTEE, REGISTRAR, ATTESTOR, OPERATOR
- Hierarchical roles with parent inheritance
- Permission system (resource/action/scope tuples)
- CheckCommittee() method for admin authorization
- TutusCommittee config for initial committee members
PersonToken integration:
- Added RoleRegistry field for cross-contract calls
- checkCommittee helper delegates to RoleRegistry with NEO fallback
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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