Role-Based Access Control (RBAC)

[onelrian]

• Priority: HIGH | Effort: LARGE | Dependencies: TICKET-005
• Acceptance Criteria:
  • Permission system implementation
  • Role hierarchy definition (SuperAdmin → Viewer)
  • API endpoint protection middleware
  • Resource-based permissions
  • Organization-scoped permissions
  • Permission checking utilities
  • Admin role management endpoints
• Files: backend/src/auth/permissions.rs, backend/src/api/middleware/rbac.rs