Declare the search deploy unit before the migration chain

The migration chain starts mastodon-search-deploy.service immediately, but the systemd_unit resource was declared later in the recipe, so the unit did not exist yet and systemctl failed with 'Unit not found'.

site-cookbooks/kosmos-mastodon/recipes/deploy.rb

@@ -94,6 +94,28 @@ execute "restart mastodon services" do
   action :nothing
 end
 
+# Populate the Elasticsearch indices in the background. The indices and
+# mappings are created synchronously during the deployment; this unit only does
+# the (potentially very long) import, so it is started without blocking. Declared
+# before the migration chain below because that chain starts it.
+systemd_unit 'mastodon-search-deploy.service' do
+  content({
+    Unit: {
+      Description: 'Populate the Mastodon search index'
+    },
+    Service: {
+      Type: "oneshot",
+      User: mastodon_user,
+      WorkingDirectory: mastodon_path,
+      Environment: "RAILS_ENV=#{rails_env}",
+      ExecStart: "#{bundle_path} exec bin/tootctl search deploy",
+      TimeoutStartSec: "21600",
+    }
+  })
+  triggers_reload true
+  action [:create]
+end
+
 # Mastodon 4.4+ splits migrations into pre- and post-deployment phases.
 # Pre-deployment migrations must run before the services are (re)started.
 execute "rake db:migrate (pre-deployment)" do
@@ -203,30 +225,6 @@ systemd_unit 'mastodon-delete-old-media-cache.timer' do
   action [:create, :enable, :start]
 end
 
-#
-# Populate the Elasticsearch indices in the background. The indices and
-# mappings are created synchronously by the recipe above; this unit only does
-# the (potentially very long) import, so it is started without blocking.
-#
-
-systemd_unit 'mastodon-search-deploy.service' do
-  content({
-    Unit: {
-      Description: 'Populate the Mastodon search index'
-    },
-    Service: {
-      Type: "oneshot",
-      User: mastodon_user,
-      WorkingDirectory: mastodon_path,
-      Environment: "RAILS_ENV=#{rails_env}",
-      ExecStart: "#{bundle_path} exec bin/tootctl search deploy",
-      TimeoutStartSec: "21600",
-    }
-  })
-  triggers_reload true
-  action [:create]
-end
-
 firewall_rule "mastodon_app" do
   port     node['kosmos-mastodon']['app_port']
   source   "10.1.1.0/24"