All DTOs for ESI API responses, settings XML/JSON, and market data. No logic beyond data shape.

• ESI API: DataContractJsonSerializer for CCP's ESI endpoints
• Settings (legacy): XmlSerializer for pre-5.x XML settings files
• Settings (current): System.Text.Json for the new JSON settings format
• Market data: DTOs for EveMarketer, Fuzzworks, and EveMarketData

• Serializable DTO classes (SerializableXxx) that map to API or file formats
• No constructors with logic, no service references, no business rules

• Deserialization logic or file I/O (that lives in Common or Infrastructure)
• Domain model classes (those are in Models)

• Serialization/Esi/ -- ESI endpoint response DTOs (characters, assets, skills, market, etc.)
• Serialization/Eve/ -- Static data file DTOs (items, skills, blueprints, certificates)
• Serialization/Settings/ -- SerializableSettings, SerializableSettingsCharacter, etc.
• Serialization/Exportation/ -- Plan export formats
• Serialization/EveMarketer/, Fuzzworks/, Osmium/ -- Third-party market DTOs

• EveLens.Core, EveLens.Data