feat: notify all members of the first signing group on send

packages/lib/server-only/document/send-document.ts

@@ -38,6 +38,7 @@ import { isDocumentCompleted } from '../../utils/document';
 import { extractDocumentAuthMethods } from '../../utils/document-auth';
 import { type EnvelopeIdOptions, mapSecondaryIdToDocumentId } from '../../utils/envelope';
 import { toCheckboxCustomText, toRadioCustomText } from '../../utils/fields';
+import { filterRecipientsInFirstSigningGroup } from '../../utils/recipient-groups';
 import { getRecipientsWithMissingFields, isRecipientEmailValidForSending } from '../../utils/recipients';
 import { getEnvelopeWhereInput } from '../envelope/get-envelope-by-id';
 import { insertFormValuesInPdf } from '../pdf/insert-form-values-in-pdf';
@@ -150,10 +151,11 @@ export const sendDocument = async ({ id, userId, teamId, sendEmail, requestMetad
   let recipientsToNotify = envelope.recipients;
 
   if (signingOrder === DocumentSigningOrder.SEQUENTIAL) {
-    // Get the currently active recipient.
-    recipientsToNotify = envelope.recipients
-      .filter((r) => r.signingStatus === SigningStatus.NOT_SIGNED && r.role !== RecipientRole.CC)
-      .slice(0, 1);
+    // Get the currently active signing group. Recipients sharing the lowest
+    // pending signing order act in parallel within their group.
+    recipientsToNotify = filterRecipientsInFirstSigningGroup(
+      envelope.recipients.filter((r) => r.signingStatus === SigningStatus.NOT_SIGNED && r.role !== RecipientRole.CC),
+    );
   }
 
   if (envelope.envelopeItems.length === 0) {