feat(DENG-10038): Add column descriptions

Author: kwindau

sql/moz-fx-data-shared-prod/firefox_desktop_derived/metrics_clients_daily_v1/schema.yaml

@@ -15,12 +15,15 @@ fields:
 - name: normalized_channel
   type: STRING
   mode: NULLABLE
+  description: The normalized channel the application is being distributed on.
 - name: n_metrics_ping
   type: INTEGER
   mode: NULLABLE
+  description: Number of metrics pings this client received on this submission date.
 - name: days_sent_metrics_ping_bits
   type: INTEGER
   mode: NULLABLE
+  description: Value of 1 if the client ID sent a metric ping on this date.
 - name: profile_group_id
   type: STRING
   mode: NULLABLE

sql/moz-fx-data-shared-prod/firefox_desktop_derived/metrics_clients_first_seen_v1/metadata.yaml

@@ -24,4 +24,4 @@ bigquery:
   clustering:
     fields:
     - sample_id
-require_column_descriptions: false
+require_column_descriptions: true

sql/moz-fx-data-shared-prod/firefox_desktop_derived/metrics_clients_first_seen_v1/schema.yaml

@@ -19,12 +19,15 @@ fields:
 - name: normalized_channel
   type: STRING
   mode: NULLABLE
+  description: The normalized channel the application is being distributed on.
 - name: n_metrics_ping
   type: INTEGER
   mode: NULLABLE
+  description: Number of metrics pings this client received on this submission date.
 - name: days_sent_metrics_ping_bits
   type: INTEGER
   mode: NULLABLE
+  description: Value of 1 if the client ID sent a metric ping on this date.
 - name: profile_group_id
   type: STRING
   mode: NULLABLE
@@ -48,6 +51,7 @@ fields:
 - name: default_search_engine
   type: STRING
   mode: NULLABLE
+  description: ?
 - name: xpcom_abi
   type: STRING
   mode: NULLABLE