Add maintainer_note field to CI runners table

Changelog: added

app/models/ci/runner.rb

@@ -210,6 +210,8 @@ module Ci
 
     validates :config, json_schema: { filename: 'ci_runner_config' }
 
+    validates :maintainer_note, length: { maximum: 255 }
+
     # Searches for runners matching the given query.
     #
     # This method uses ILIKE on PostgreSQL for the description field and performs a full match on tokens.

db/migrate/20220111095006_add_maintainer_note_to_ci_runners.rb

+# frozen_string_literal: true
+
+class AddMaintainerNoteToCiRunners < Gitlab::Database::Migration[1.0]
+  enable_lock_retries!
+
+  def change
+    # rubocop:disable Migration/AddLimitToTextColumns
+    # limit is added in 20220111095007_add_text_limit_to_ci_runners_maintainer_note.rb
+    add_column :ci_runners, :maintainer_note, :text
+    # rubocop:enable Migration/AddLimitToTextColumns
+  end
+end

db/migrate/20220111095007_add_text_limit_to_ci_runners_maintainer_note.rb

+# frozen_string_literal: true
+
+class AddTextLimitToCiRunnersMaintainerNote < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  def up
+    add_text_limit :ci_runners, :maintainer_note, 255
+  end
+
+  def down
+    remove_text_limit :ci_runners, :maintainer_note
+  end
+end

db/schema_migrations/20220111095006

+0bc00cc8a5fa7cafa665ec113a4d0d1384c5acde37dfdf53ab1f5a2e1d6acb02
\ No newline at end of file

db/schema_migrations/20220111095007

+65259b0e71c1883b81c61354325cfeeade0013b55af8901bf707f2a94ee3a46a
\ No newline at end of file

db/structure.sql

@@ -12177,7 +12177,9 @@ CREATE TABLE ci_runners (
     public_projects_minutes_cost_factor double precision DEFAULT 0.0 NOT NULL,
     private_projects_minutes_cost_factor double precision DEFAULT 1.0 NOT NULL,
     config jsonb DEFAULT '{}'::jsonb NOT NULL,
-    executor_type smallint
+    executor_type smallint,
+    maintainer_note text,
+    CONSTRAINT check_56f5ea8804 CHECK ((char_length(maintainer_note) <= 255))
 );
 
 CREATE SEQUENCE ci_runners_id_seq