RepositoryConnectivityImpl class

Default repository that maps raw payloads to domain (ConnectivityModel) and enforces error semantics using an ErrorMapper.

Error contract

• fromPayload(...) detects business errors encoded in payloads and returns Left(ErrorItem).
• If mapping fails (fromJson throws), the repository converts it into Left(ErrorItem) via fromException(...).
• Repository never throws; it always returns Either<ErrorItem, ConnectivityModel>.

Example

final repo = RepositoryConnectivityImpl(gateway, errorMapper: DefaultErrorMapper());
final res = await repo.snapshot();
res.fold(
  (err) => print('Repo error: ${err.code}'),
  (model) => print('Speed: ${model.internetSpeed}'),
);