Add vulnerability finding uuid to feedback

Includes migration, changelog and schema

changelogs/unreleased/277130-add-a-new-column-called-finding_uuid-into-the-vulnerability_feedba.yml

+---
+title: Add new column `finding_uuid` into `vulnerability_feedback` table
+merge_request: 48923
+author:
+type: changed

db/migrate/20201201163227_add_finding_uuid_to_vulnerability_feedback.rb

+# frozen_string_literal: true
+
+class AddFindingUuidToVulnerabilityFeedback < ActiveRecord::Migration[6.0]
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  def change
+    add_column :vulnerability_feedback, :finding_uuid, :uuid
+  end
+end

db/schema_migrations/20201201163227

+cc978ac56ed177575706436c52125b51915dff97a20ed47ae0c7b16caa837313
\ No newline at end of file

db/structure.sql

@@ -17376,7 +17376,8 @@ CREATE TABLE vulnerability_feedback (
     merge_request_id integer,
     comment_author_id integer,
     comment text,
-    comment_timestamp timestamp with time zone
+    comment_timestamp timestamp with time zone,
+    finding_uuid uuid
 );
 
 CREATE SEQUENCE vulnerability_feedback_id_seq