Default the :tasks_by_type_chart feature flag on

Adds additional documentation about the
tasks by type chart to value stream analytics

doc/user/analytics/value_stream_analytics.md

@@ -280,6 +280,28 @@ administrator can open a Rails console and disable it with the following command
 Feature.disable(:cycle_analytics_scatterplot_median_enabled)
 ```
 
+## Type of work - Tasks by type chart
+
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/32421) in GitLab 12.10.
+
+This chart shows a cumulative count of issues and merge requests per day.
+
+This chart uses the global page filters for displaying data based on the selected
+group, projects, and timeframe. The chart defaults to showing counts for issues but can be
+toggled to show data for merge requests and further refined for specific group-level labels.
+
+By default the top group-level labels (max. 10) are pre-selected, with the ability to
+select up to a total of 15 labels.
+
+### Disabling chart
+
+This chart is enabled by default. If you have a self-managed instance, an
+administrator can open a Rails console and disable it with the following command:
+
+```ruby
+Feature.disable(:tasks_by_type_chart)
+```
+
 ## Permissions
 
 The current permissions on the Project Value Stream Analytics dashboard are:

ee/app/controllers/analytics/cycle_analytics_controller.rb

@@ -10,7 +10,7 @@ class Analytics::CycleAnalyticsController < Analytics::ApplicationController
     push_frontend_feature_flag(:customizable_cycle_analytics, default_enabled: true)
     push_frontend_feature_flag(:cycle_analytics_scatterplot_enabled, default_enabled: true)
     push_frontend_feature_flag(:cycle_analytics_scatterplot_median_enabled, default_enabled: true)
-    push_frontend_feature_flag(:tasks_by_type_chart)
+    push_frontend_feature_flag(:tasks_by_type_chart, default_enabled: true)
   end
 
   before_action :load_group, only: :show

ee/app/controllers/groups/analytics/cycle_analytics_controller.rb

@@ -12,7 +12,7 @@ class Groups::Analytics::CycleAnalyticsController < Groups::Analytics::Applicati
     push_frontend_feature_flag(:customizable_cycle_analytics, default_enabled: true)
     push_frontend_feature_flag(:cycle_analytics_scatterplot_enabled, default_enabled: true)
     push_frontend_feature_flag(:cycle_analytics_scatterplot_median_enabled, default_enabled: true)
-    push_frontend_feature_flag(:tasks_by_type_chart)
+    push_frontend_feature_flag(:tasks_by_type_chart, default_enabled: true)
   end
 
   before_action :load_group, only: :show