Added 'drush' directory to '.gitignore.artifact' and sorted entries.

.gitignore.artifact

@@ -4,11 +4,12 @@
 /*
 
 # Do not ignore required files.
+!.env
 !/config/
+!/drush/
 !/scripts/
 !/vendor/
 !composer.json
-!.env
 
 # Do not ignore webroot (manage Drupal Scaffold files using the composer.json)
 !web

.vortex/installer/tests/Fixtures/handler_process/deploy_types_all_circleci/.gitignore.artifact

@@ -4,11 +4,12 @@
 /*
 
 # Do not ignore required files.
+!.env
 !/config/
+!/drush/
 !/scripts/
 !/vendor/
 !composer.json
-!.env
 
 # Do not ignore webroot (manage Drupal Scaffold files using the composer.json)
 !web

.vortex/installer/tests/Fixtures/handler_process/deploy_types_all_gha/.gitignore.artifact

@@ -4,11 +4,12 @@
 /*
 
 # Do not ignore required files.
+!.env
 !/config/
+!/drush/
 !/scripts/
 !/vendor/
 !composer.json
-!.env
 
 # Do not ignore webroot (manage Drupal Scaffold files using the composer.json)
 !web

.vortex/installer/tests/Fixtures/handler_process/deploy_types_artifact/.gitignore.artifact

@@ -4,11 +4,12 @@
 /*
 
 # Do not ignore required files.
+!.env
 !/config/
+!/drush/
 !/scripts/
 !/vendor/
 !composer.json
-!.env
 
 # Do not ignore webroot (manage Drupal Scaffold files using the composer.json)
 !web

.vortex/installer/tests/Fixtures/handler_process/hosting_acquia/.gitignore.artifact

@@ -4,11 +4,12 @@
 /*
 
 # Do not ignore required files.
+!.env
 !/config/
+!/drush/
 !/scripts/
 !/vendor/
 !composer.json
-!.env
 
 # Do not ignore webroot (manage Drupal Scaffold files using the composer.json)
 !docroot

.vortex/installer/tests/Fixtures/handler_process/hosting_project_name___acquia/.gitignore.artifact

@@ -4,11 +4,12 @@
 /*
 
 # Do not ignore required files.
+!.env
 !/config/
+!/drush/
 !/scripts/
 !/vendor/
 !composer.json
-!.env
 
 # Do not ignore webroot (manage Drupal Scaffold files using the composer.json)
 !docroot

.vortex/tests/phpunit/Traits/Subtests/SubtestDeploymentTrait.php

@@ -71,6 +71,7 @@ protected function assertDeploymentFilesPresent(string $dir, string $webroot = '
     $this->assertFileDoesNotExist($dir . '/.gitignore.artifact', '.gitignore.artifact should not exist in deployment');
 
     // Required directories should exist.
+    $this->assertDirectoryExists($dir . '/drush', 'Drush directory should exist in deployment');
     $this->assertDirectoryExists($dir . '/scripts', 'Scripts directory should exist in deployment');
     $this->assertDirectoryExists($dir . '/vendor', 'Vendor directory should exist in deployment');