fix: show relative path in NotFoundException

Signed-off-by: Maksim Sukharev <[email protected]>

lib/private/Files/Utils/Scanner.php

@@ -251,7 +251,7 @@ public function scan($dir = '', $recursive = \OC\Files\Cache\Scanner::SCAN_RECUR
 			});
 
 			if (!$storage->file_exists($relativePath)) {
-				throw new NotFoundException($dir);
+				throw new NotFoundException($dir . ' (relative path: "' . $relativePath . '")');
 			}
 
 			if ($this->useTransaction) {