Include the JSON encoded response, when throwing an unknown response format in mouser provider

Should help to debug issue #820

src/Services/InfoProviderSystem/Providers/MouserProvider.php

@@ -205,7 +205,7 @@ class MouserProvider implements InfoProviderInterface
         if (isset($arr['SearchResults'])) {
             $products = $arr['SearchResults']['Parts'] ?? [];
         } else {
-            throw new \RuntimeException('Unknown response format');
+            throw new \RuntimeException('Unknown response format: ' .json_encode($arr, JSON_THROW_ON_ERROR));
         }
 
         $result = [];