feat: add parentFileId support in RequestSignatureService

Add support for parentFileId parameter in saveFile method to allow
associating files with a parent envelope when creating new files.

Signed-off-by: Vitor Mattos <[email protected]>

Author: vitormattos

lib/Service/RequestSignatureService.php

@@ -244,6 +244,10 @@ public function saveFile(array $data): FileEntity {
 			$file->setStatus(FileEntity::STATUS_ABLE_TO_SIGN);
 		}
 
+		if (isset($data['parentFileId'])) {
+			$file->setParentFileId($data['parentFileId']);
+		}
+
 		$this->setSignatureFlow($file, $data);
 		$this->setDocMdpLevelFromGlobalConfig($file);