Update: use simplenote:user_id instead of wpcom:user_id for Tracks

[codebykat]

Fix

Will close #3290.

I'm not sure I fully understand this code, but it looks like we are at least attempting to use the WPCOM info if we have a cookie, but it is sending the email rather than the user ID (which we may not have access to).

I think (am concerned?) it might be falling back to anon in all cases where there is not a WPCOM login, rather than sending the Simplenote ID (email address).

Is it worth looking to see if we can instead submit these Tracks events using a different field, in the case where we have WPCOM login info? I'm not sure if we can use the email as a primary key for Tracks (not providing the ID field at all).

Test

Release

RELEASE-NOTES.md was updated with:

Updated the ID type used for analytics to avoid sending invalid WPCOM IDs

[roundhill]

I don't think we want to try and send wpcom info at all - makes no sense. This feels like we went about it all wrong originally - it should be sending up the Simplenote user's email if they are signed in, and not read any wpcom cookies or anything... weird.