feat(sounds): absolute audio paths for custom sounds making IVRs fully language-agnostic (v1.5.0)

public/api.php

@@ -140,7 +140,7 @@ try {
             $installedVerData = file_exists("{$appDir}/version.json")
                 ? json_decode((string)file_get_contents("{$appDir}/version.json"), true)
                 : [];
-            $installedVer = $installedVerData['version'] ?? '1.4.9';
+            $installedVer = $installedVerData['version'] ?? '1.5.0';
 
             echo json_encode([
                 'success'          => true,