Type definition for Migration Entry. Records bind to it with attributesSchema: hm://z6MkuBbsB1HbSNXLvJCRCrPhimY6g7tzhr4qvcYKPuSZzhno/user-story-maps/schemas/migration-entry; collections bind their children with childAttributesSchema. The schema evolves in place: publishing a new schemaDefinition on this document is a new version of the same type, and this document's history is the schema's history. Pin an exact contract with hm://z6MkuBbsB1HbSNXLvJCRCrPhimY6g7tzhr4qvcYKPuSZzhno/user-story-maps/schemas/migration-entry?v=<version> or the schema's ipfs:// CID.