v0.5.0: Restructure class hierarchy with LegalFragment as root class - Add LegalFragment as LOMO-native root class for legal fragments - Set owl:equivalentClass to cdm:fragment_resource_legal and eli:LegalInformationObject - Restrict LegalRequirement to prescriptive rules (obligation, permission, prohibition, right) - Convert ConstitutiveRule from DeonticModality individual to proper Class - Make Definition a subclass of ConstitutiveRule - Remove ConstitutiveRule from DeonticModalityScheme (not a deontic modality) - Update hasDeonticModality, produces, setDefinition properties accordingly Fixes conceptual conflicts where LegalRequirement was too broad, ConstitutiveRule was mis-classified as deontic modality, and Definition was incorrectly positioned in the hierarchy.