add submission created webhook event

app/jobs/send_submission_created_webhook_request_job.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+class SendSubmissionCreatedWebhookRequestJob < ApplicationJob
+  USER_AGENT = 'DocuSeal.co Webhook'
+
+  MAX_ATTEMPTS = 10
+
+  def perform(submission, params = {})
+    attempt = params[:attempt].to_i
+    url = Accounts.load_webhook_url(submission.account)
+
+    return if url.blank?
+
+    preferences = Accounts.load_webhook_preferences(submission.account)
+
+    return if preferences['submission.created'].blank?
+
+    resp = begin
+      Faraday.post(url,
+                   {
+                     event_type: 'submission.created',
+                     timestamp: Time.current,
+                     data: Submissions::SerializeForApi.call(submission)
+                   }.to_json,
+                   'Content-Type' => 'application/json',
+                   'User-Agent' => USER_AGENT)
+    rescue Faraday::Error
+      nil
+    end
+
+    if (resp.nil? || resp.status.to_i >= 400) && attempt <= MAX_ATTEMPTS &&
+       (!Docuseal.multitenant? || submission.account.account_configs.exists?(key: :plan))
+      SendSubmissionCreatedWebhookRequestJob.set(wait: (2**attempt).minutes)
+                                            .perform_later(submission, {
+                                                             attempt: attempt + 1,
+                                                             last_status: resp&.status.to_i
+                                                           })
+    end
+  end
+end