Reading/Web/Preference Persistence For Anonymous Users/Updates

Phases

 * ✅ Phase 1 : Identify the decision team and project owner
 * ✅ Phase 2 : Define the problem statement
 * ✅ Phase 3 : Get feedback from the Decision Forum (T333877)
 * ✅ Phase 4 : Phase 4: Research and prototype solutions - Summary (T333878)
 * Phase 5 : Phases 5 & 6: Make and document decision (T333882)
 * Post-TDMP : Implement Anonymous Preference Persistence API (T333883)

: TDMP Ticket Created
We created a Phabricator Epic to cover going through the Technical Decision Making Process.