The Peru tax authority's electronic invoicing provider has officially changed its name from Digiflow to Estela. This update changes all references to the provider name throughout the system while keeping all workflows and functionality exactly the same. This ensures the system accurately reflects the current provider name for Peruvian users.

Our OSE in Peru changed name from Digiflow to Estela, this commit is to change the name in all the code. All workflows remain unchanged. Variables were not modified.