Introduce dismissal reason for vulnerability feedback

changelogs/unreleased/293679_introduce_dismissal_reason_for_vulnerability_feedback.yml

+---
+title: Add `dismissal_reason` column into the `vulnerability_feedback` table
+merge_request: 50632
+author:
+type: added

db/migrate/20201228184500_add_dismissal_reason_into_vulnerability_feedback_table.rb

+# frozen_string_literal: true
+
+class AddDismissalReasonIntoVulnerabilityFeedbackTable < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def up
+    add_column :vulnerability_feedback, :dismissal_reason, :smallint
+  end
+
+  def down
+    remove_column :vulnerability_feedback, :dismissal_reason
+  end
+end

db/schema_migrations/20201228184500

+9018fed4aab19642fafee3e50bf41be422fc3f8256d0b5d78c8a70fc96f4090f
\ No newline at end of file

db/structure.sql

@@ -17645,7 +17645,8 @@ CREATE TABLE vulnerability_feedback (
     comment_author_id integer,
     comment text,
     comment_timestamp timestamp with time zone,
-    finding_uuid uuid
+    finding_uuid uuid,
+    dismissal_reason smallint
 );
 
 CREATE SEQUENCE vulnerability_feedback_id_seq

ee/app/models/vulnerabilities/feedback.rb

@@ -14,6 +14,7 @@ module Vulnerabilities
 
     attr_accessor :vulnerability_data
 
+    enum dismissal_reason: { acceptable_risk: 0, false_positive: 1, mitigating_control: 2, used_in_tests: 3, not_applicable: 4 }
     enum feedback_type: { dismissal: 0, issue: 1, merge_request: 2 }, _prefix: :for
     enum category: ::Enums::Vulnerability.report_types
 

ee/spec/models/vulnerabilities/feedback_spec.rb

@@ -11,6 +11,7 @@ RSpec.describe Vulnerabilities::Feedback do
     )
   }
   it { is_expected.to define_enum_for(:category) }
+  it { is_expected.to define_enum_for(:dismissal_reason) }
 
   describe 'associations' do
     it { is_expected.to belong_to(:project) }