Remove null constraint from security_scan_succeeded column

Changelog: changed

db/post_migrate/20220222191845_remove_not_null_constraint_for_security_scan_succeeded.rb

+# frozen_string_literal: true
+
+class RemoveNotNullConstraintForSecurityScanSucceeded < Gitlab::Database::Migration[1.0]
+  def up
+    change_column_null :analytics_devops_adoption_snapshots, :security_scan_succeeded, true
+  end
+
+  def down
+    # There may now be nulls in the table, so we cannot re-add the constraint here.
+  end
+end

db/schema_migrations/20220222191845

+c528d64cafc072554cd1ef1006a1c359a3135896abae2d5ca20fbbc99ff14f8c
\ No newline at end of file

db/structure.sql

@@ -10191,7 +10191,7 @@ CREATE TABLE analytics_devops_adoption_snapshots (
     runner_configured boolean NOT NULL,
     pipeline_succeeded boolean NOT NULL,
     deploy_succeeded boolean NOT NULL,
-    security_scan_succeeded boolean NOT NULL,
+    security_scan_succeeded boolean,
     end_time timestamp with time zone NOT NULL,
     total_projects_count integer,
     code_owners_used_count integer,