feat: add header metadata to emails (#2927)

packages/lib/jobs/definitions/emails/send-signing-email.handler.ts

@@ -16,6 +16,7 @@ import { createElement } from 'react';
 import { getI18nInstance } from '../../../client-only/providers/i18n-server';
 import { NEXT_PUBLIC_WEBAPP_URL } from '../../../constants/app';
 import { RECIPIENT_ROLE_TO_EMAIL_TYPE, RECIPIENT_ROLES_DESCRIPTION } from '../../../constants/recipient-roles';
+import { buildEnvelopeEmailHeaders } from '../../../server-only/email/build-envelope-email-headers';
 import { getEmailContext } from '../../../server-only/email/get-email-context';
 import { assertOrganisationRatesAndLimits } from '../../../server-only/rate-limit/assert-organisation-rates-and-limits';
 import { updateRecipientNextReminder } from '../../../server-only/recipient/update-recipient-next-reminder';
@@ -224,6 +225,11 @@ export const run = async ({ payload, io }: { payload: TSendSigningEmailJobDefini
         subject: renderCustomEmailTemplate(documentMeta?.subject || emailSubject, customEmailTemplate),
         html,
         text,
+        headers: buildEnvelopeEmailHeaders({
+          userId,
+          envelopeId: envelope.id,
+          teamId: envelope.teamId,
+        }),
       });
     });
   }