- Define Certificate model with full X.509 attributes
- Add CertificateAuthority model for CA management
- Implement CertificateRequest model for CSR handling
- Add CertificateRevocationList model for CRL support
- Define User and Organization models for access control
- Include comprehensive certificate type definitions (web, client, email, etc.)
- Add status enums for certificates, requests, and organizations
- Configure GORM relationships and constraints
