TEMP! Split PDF traffic

[Pchelolo]

https://phabricator.wikimedia.org/T186748

[Pchelolo]

It's a no-op until a config change. We can make the config change in beta cluster only for now.

On a later stage we will expose the type and format parameters as well - as soon as we're sure we're switching to the new imlementation.

[Pchelolo]

The tests pass locally... interesting

[d00rman]

LGTM. We should also remember to make a grafana dashboard for Proton.

[d00rman]

We should also remember to make a grafana dashboard for Proton.

Created T201158 for that. Let's not merge this PR until that is completed.

[d00rman]

@Pchelolo could we also have an undocumented query param that allows one to retrieve the PDF generated by Proton? I figure this would be very helpful for Reading to evaluate the visual output that it generates.

[Pchelolo]

could we also have an undocumented query param that allows one to retrieve the PDF generated by Proton?

Done, added new_pdf hidden query parameter.

[d00rman]

Done, added new_pdf hidden query parameter.

Obrigado @Pchelolo !