pridany flow diagram pre BUG,

aktualizovany v README Technologie, struktura a API endpointy

lib/functions.inc.php

@@ -235,7 +235,8 @@ function attachmentUpdate($attachment_id, $attachment_content) {
 	global $db;
 	if (strlen(trim($attachment_content)) <= 0) return attachmentDelete($attachment_id);
 	$stm = $db->update('attachments', [
-		'attachment_content' => $attachment_content
+		'attachment_content' => $attachment_content,
+		'updated_dt' => date('Y-m-d H:i:s')
 	], [
 		'attachment_id' => $attachment_id
 	]);