Add tracking to the trial status sidebar widget experiment

What’s Included

Backend Recording

• Record which groups receive the control experience vs. which groups receive the candidate experience
  • Handled in !53301 (merged)
  • Store the top-level group (root group) in the experiment_subjects table (might be nice to have #289941 (closed) / !50084 (closed) for this purpose, but not necessary)

Frontend Tracking

• Track click rate of the widget itself – will be handled by a standard (frontend) Snowplow event
  • Handled in !55411 (merged)
  • These clicks will take the user to the billing page for the top-level group
  • Event Details
    • Event name: click_link
    • Event label: trial_status_widget
    • Event category: automatically set to be the URL of the page the user was on when they clicked
    • Context: namespace_id: group.id (Can’t have this yet as our current policy doesn’t allow it)
• Track click rate of the two CTA buttons (each will be tracked separately)
  • Handled in !55411 (merged)
  • One takes the user to the billing page, one takes them to the in-app purchase flow
  • Event Details
    • Event name: click_link
    • Event label: upgrade_to_ultimate or compare_plans
    • Event category: automatically set to be the URL of the page the user was on when they clicked
• Track view rate of the popover
  • Handled in !55810 (merged)
  • Need a custom fired event whenever the popover component is mounted (maybe?)
  • Event Details
    • Event name: show_component
    • Event label: trial_status_popover
    • Event category: use the URL of the page the user is on (maybe?)

Potential Follow-up

• Track the trial upgrade rate of the control vs. experimental cohorts
  • I’m thinking that this won’t be necessary to explicitly track as we can manually correlate the data in Sisense.

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Follow-up from #288014 (closed), also related to #220930 (closed)