Introduce Email and CPF Value Objects

[ericklucioh]

Summary

Refactor of CPF/CNPJ document handling to improve consistency, validation safety, and object-oriented design.

• Removed incorrect use of @dataclass in inherited classes
• Centralized normalization logic in base Document class
• Enforced validation at object construction (invalid documents can no longer be instantiated)
• Simplified get_identifier by relying on constructor validation instead of duplicated checks

This change ensures stronger domain integrity and aligns the implementation with Value Object patterns.

Release metadata

Release note (PT-BR):
Refatoração da validação e modelagem de CPF/CNPJ para garantir integridade dos objetos e melhorar a estrutura orientada a objetos.

Release note (EN):
Refactor of CPF/CNPJ validation and modeling to ensure object integrity and improve object-oriented structure.

Release highlights (PT-BR, bullets with |):
Validação garantida na criação de CPF/CNPJ | Remoção de uso incorreto de dataclass | Código mais consistente e seguro

Release highlights (EN, bullets with |):
Validation enforced at object creation | Removed incorrect dataclass usage | More consistent and safer code

Included pattern IDs (comma-separated, or none):
none

Technical changes (PT-BR, bullets with |):
Remoção de @DataClass em classes herdadas | Uso correto de herança com super().init | Validação movida para construtor | Simplificação da função get_identifier

Technical changes (EN, bullets with |):
Removed @DataClass from inherited classes | Proper inheritance using super().init | Validation moved to constructor | Simplified get_identifier function

Change type (choose one release label from taxonomy):

• release:major
• release:feature
• release:patterns
• release:api
• release:data
• release:privacy
• release:fix
• release:docs
• release:infra
• release:security

Breaking change?

• No
• Yes (describe migration/impact in summary)

Validation

• Local tests/checks passed for impacted scope
• CI and Security checks are green
• Exactly one release label is set on this PR

Public safety and compliance checklist

• No personal identifier exposure was introduced
• PUBLIC_MODE behavior was reviewed (if relevant)
• Public boundary gate is green
• Public endpoints and demo data contain no personal data fields
• Legal/policy docs were reviewed for scope-impacting changes
• Snapshot boundary remains compliant with docs/release/public_boundary_matrix.csv

Risk and rollback

Risks:

• Existing code that instantiates Cpf/Cnpj without validation may now raise exceptions
• Hidden dependencies relying on previous permissive behavior

Rollback plan:

• Revert this PR to restore previous behavior
• Alternatively, temporarily reintroduce is_valid checks before instantiation in callers