feat: Users API, ownership transfer and removal of the legacy role string

internal/infrastructure/persistence/mappers/inviteMapper.go

@@ -12,6 +12,7 @@ func InviteToDomain(m models.Invite) invite.Invite {
 		HashedCode: m.HashedCode,
 		ExpiresAt:  m.ExpiresAt,
 		InvitedBy:  m.InvitedBy,
+		RoleID:     nullableIDToDomain(m.RoleID),
 		AcceptedAt: m.AcceptedAt,
 		CreatedAt:  m.CreatedAt,
 	}
@@ -24,6 +25,7 @@ func InviteToModel(i invite.Invite) models.Invite {
 		HashedCode: i.HashedCode,
 		ExpiresAt:  i.ExpiresAt,
 		InvitedBy:  i.InvitedBy,
+		RoleID:     DomainToNullableID(i.RoleID),
 		AcceptedAt: i.AcceptedAt,
 		CreatedAt:  i.CreatedAt,
 	}