Fix /admin/jobs failing to load due to statement timeout

The `ORDER BY created_at DESC` clause causes a sequential scan because
there is no index on the `created_at` column. We can sort by `id`
or by `updated_at` to make things fast.

Closes #49767

app/controllers/admin/jobs_controller.rb

@@ -2,7 +2,7 @@ class Admin::JobsController < Admin::ApplicationController
   def index
     @scope = params[:scope]
     @all_builds = Ci::Build
-    @builds = @all_builds.order('created_at DESC')
+    @builds = @all_builds.order('id DESC')
     @builds =
       case @scope
       when 'pending'

changelogs/unreleased/sh-fix-admin-jobs-controller-timing-out.yml

@@ -0,0 +1,5 @@
+---
+title: Fix /admin/jobs failing to load due to statement timeout
+merge_request: 20909
+author:
+type: performance