Enable automatic translation for chat messages

[svenseeberg]

The Integreat CMS needs to translate the incoming messages for each ticket into the region main language. Returned messages need to be translated into the app language.

The original post can be stored as the main request. The translation can be saved as an internal note within the ticket. It will not be returned to the user with #21

Answers can either be updated or a second translated answer can be created.

For translations (for the time being) the region translation budget will be used.

[svenseeberg]

To implement the functionality, we need to add the green marked flows and edit the yellow ones:

(Black is already implemented and blue is out of scope / next milestone.)

[svenseeberg]

There is one issue we need to solve: Zammad Webhooks to the Integreat CMS should only be triggered if a person updates a ticket. When either the Integreat CMS user or the system itself updates a ticket, nothing should happen.

This seems to work:

https://docs.zammad.org/en/latest/install/elasticsearch/indexed-attributes.html

The easiest way to filter automatically created messages in webhooks is the article subject (not ticket subject) and set it to automatically generated message:

Alternatively, we can create a dedicated user Integreat CMS Auto Message <tech+integreat-cms-auto-message@tuerantuer.org> that can be set as recipient for all automatically created messages. We can then use the Trigger in Zammad to ignore all events that have this recipient.