Added project status and asynchronous initialization

app/jobs/project_post_init_job.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class ProjectPostInitJob < ApplicationJob
+  queue_as :default
+
+  def perform(project_id)
+    project = Project.preparing.find(project_id)
+
+    create_tasks_number_sequence(project)
+    project.update!(status: :ready)
+  end
+
+  private
+
+  def create_tasks_number_sequence(project)
+    Project.connection.execute "CREATE SEQUENCE IF NOT EXISTS #{project.tasks_number_sequence_name} AS INT UNSIGNED"
+  end
+end