feat(DENG-9765): Update key event list based on what blog.mozilla.org currently considers key events

Author: kwindau

sql/moz-fx-data-shared-prod/mozilla_org_derived/blog_performance_v1/query.sql

@@ -1,4 +1,3 @@
---note to self - still need to add engagement rate & figure out key events list
 WITH staging AS (
   SELECT
     event_date,
@@ -46,7 +45,14 @@ SELECT
   page_title,
   --placeholder, waiting for list of actual key events from Stephen
   COUNTIF(
-    event_name IN ('link_click', 'download_click', 'scroll', 'cta_click', 'click', 'search')
+    event_name IN (
+      'click',
+      'cta_click',
+      'download_click',
+      'newsletter_subscribe',
+      'scroll',
+      'social_share'
+    )
   ) AS nbr_key_events,
   SUM(page_views) AS page_views,
   COUNT(DISTINCT(ga_session_id || ' - ' || user_pseudo_id)) AS nbr_sessions

sql/moz-fx-data-shared-prod/mozilla_org_derived/blog_performance_v1/schema.yaml

@@ -10,7 +10,8 @@ fields:
 - name: nbr_key_events
   type: INTEGER
   mode: NULLABLE
-  description: Count of key events, where key events is defined as
+  description: Count of key events, where key events include the following,
+    click, cta_click, download_click, newsletter_subscribe, scroll, and social_share
 - name: page_views
   type: INTEGER
   mode: NULLABLE