Add detected_at to Vulnerabilities table

db/migrate/20210714120600_add_detected_at_to_vulnerabilities.rb

+# frozen_string_literal: true
+
+class AddDetectedAtToVulnerabilities < ActiveRecord::Migration[6.1]
+  include Gitlab::Database::MigrationHelpers
+
+  def up
+    with_lock_retries do
+      add_column :vulnerabilities, :detected_at, :datetime_with_timezone
+      change_column_default :vulnerabilities, :detected_at, -> { 'NOW()' }
+    end
+  end
+
+  def down
+    with_lock_retries do
+      remove_column :vulnerabilities, :detected_at
+    end
+  end
+end

db/schema_migrations/20210714120600

+de9167bc4f9e2b68b257a7ff81636d5dbb6d73ff81672fdf1c73adadf5707bea
\ No newline at end of file

db/structure.sql

@@ -19046,7 +19046,8 @@ CREATE TABLE vulnerabilities (
     dismissed_at timestamp with time zone,
     dismissed_by_id bigint,
     resolved_on_default_branch boolean DEFAULT false NOT NULL,
-    present_on_default_branch boolean DEFAULT true NOT NULL
+    present_on_default_branch boolean DEFAULT true NOT NULL,
+    detected_at timestamp with time zone DEFAULT now()
 );
 
 CREATE SEQUENCE vulnerabilities_id_seq