Add SRG SSR login support to analytics?

[defagos]

As a development team integrating the SRG SSR login I would like to be able to send official login information in analytics:

• user_sub: Account (URM - Custom Visitor Id in Mapp).
• user_profile: Profile associated with the account (currently not used).

Currently only Play Suisse integrates the SRG SSR login but more apps should follow in the future (Tippspiel, Zerovero). The solution should also likely replace maRTS in the future.

Remark

Official support for login-related fields only makes sense for the official SRG SSR solution. Other existing logins should be rather integrated with custom labels instead, see #31.

Acceptance criteria

• user_sub and user_profile can be sent in official analytics labels provided by Pillarbox.

Tasks

• Discuss need and API.
• Create Apple dedicated issue.
• Create Android dedicated issue.