Add createdAt to Runner GraphQL API

This change adds the "create_at" field to the Runner entity in GraphQL.

Changelog: added

app/graphql/types/ci/runner_type.rb

@@ -18,8 +18,10 @@ module Types
             description: 'ID of the runner.'
       field :description, GraphQL::Types::String, null: true,
             description: 'Description of the runner.'
+      field :created_at, Types::TimeType, null: true,
+            description: 'Timestamp of creation of this runner.'
       field :contacted_at, Types::TimeType, null: true,
-            description: 'Last contact from the runner.',
+            description: 'Timestamp of last contact from this runner.',
             method: :contacted_at
       field :maximum_timeout, GraphQL::Types::Int, null: true,
             description: 'Maximum timeout (in seconds) for jobs processed by the runner.'

doc/api/graphql/reference/index.md

@@ -8911,7 +8911,8 @@ Represents the total number of issues and their weights for a particular day.
 | <a id="cirunneraccesslevel"></a>`accessLevel` | [`CiRunnerAccessLevel!`](#cirunneraccesslevel) | Access level of the runner. |
 | <a id="cirunneractive"></a>`active` | [`Boolean!`](#boolean) | Indicates the runner is allowed to receive jobs. |
 | <a id="cirunneradminurl"></a>`adminUrl` | [`String`](#string) | Admin URL of the runner. Only available for administrators. |
-| <a id="cirunnercontactedat"></a>`contactedAt` | [`Time`](#time) | Last contact from the runner. |
+| <a id="cirunnercontactedat"></a>`contactedAt` | [`Time`](#time) | Timestamp of last contact from this runner. |
+| <a id="cirunnercreatedat"></a>`createdAt` | [`Time`](#time) | Timestamp of creation of this runner. |
 | <a id="cirunnerdescription"></a>`description` | [`String`](#string) | Description of the runner. |
 | <a id="cirunnerexecutorname"></a>`executorName` | [`String`](#string) | Executor last advertised by the runner. Available only when feature flag `graphql_ci_runner_executor` is enabled. This flag is disabled by default, because the feature is experimental and is subject to change without notice. |
 | <a id="cirunnerid"></a>`id` | [`CiRunnerID!`](#cirunnerid) | ID of the runner. |

spec/graphql/types/ci/runner_type_spec.rb

@@ -9,7 +9,7 @@ RSpec.describe GitlabSchema.types['CiRunner'] do
 
   it 'contains attributes related to a runner' do
     expected_fields = %w[
-      id description contacted_at maximum_timeout access_level active status
+      id description created_at contacted_at maximum_timeout access_level active status
       version short_sha revision locked run_untagged ip_address runner_type tag_list
       project_count job_count admin_url user_permissions executor_name
     ]

spec/requests/api/graphql/ci/runner_spec.rb

@@ -57,6 +57,7 @@ RSpec.describe 'Query.runner(id)' do
       expect(runner_data).to match a_hash_including(
         'id' => "gid://gitlab/Ci::Runner/#{runner.id}",
         'description' => runner.description,
+        'createdAt' => runner.created_at&.iso8601,
         'contactedAt' => runner.contacted_at&.iso8601,
         'version' => runner.version,
         'shortSha' => runner.short_sha,