feat: add comments to the views and remove timezone converversion

Author: kik-kik

sql/moz-fx-data-shared-prod/app_store/firefox_app_store_territory_source_type_report/view.sql

@@ -5,7 +5,9 @@ SELECT
   -- https://developer.apple.com/help/app-store-connect/view-sales-and-trends/download-and-view-reports
   -- "Time zone: Reports are based on Pacific Time (PT). A day includes transactions that happened from 12:00 a.m. to 11:59 p.m. PT."
   -- Date conversion in the query is required to unify the dates to UTC timezone which is what we use.
-  * REPLACE (TIMESTAMP(DATETIME(`date`, "America/Los_Angeles")) AS `date`),
-  `date` AS date_pst,
+  -- However, the `date` timestamp field appear to always show midnight meaning if we do timezone conversion
+  -- we will end up moving all results 1 day back if we attempt conversion to UTC.
+  -- This is why we are not doing timezone converstions here.
+  *,
 FROM
   `moz-fx-data-shared-prod.app_store_syndicate.app_store_territory_source_type_report`

sql/moz-fx-data-shared-prod/firefox_ios_derived/app_store_funnel_v1/query.sql

@@ -1,3 +1,8 @@
+-- https://developer.apple.com/help/app-store-connect/view-sales-and-trends/download-and-view-reports
+-- "Time zone: Reports are based on Pacific Time (PT). A day includes transactions that happened from 12:00 a.m. to 11:59 p.m. PT.
+-- However, the `date` timestamp field appear to always show midnight meaning if we do timezone conversion
+-- we will end up moving all results 1 day back if we attempt conversion to UTC.
+-- This is why we are not doing timezone converstions here.
 WITH historical_store_data AS (
   WITH impression_data AS (
     SELECT