refactor(notifications): use Utopia Fetch client in Webhook adapter

Replace raw curl with Utopia\Fetch\Client to align with the rest of
the codebase (Github OAuth adapter, Install task). The dispatch seam
is preserved so existing tests can still substitute responses.

src/Appwrite/Utopia/Messaging/Adapter/Webhook.php

@@ -3,6 +3,8 @@
 namespace Appwrite\Utopia\Messaging\Adapter;
 
 use Appwrite\Utopia\Messaging\Messages\Webhook as WebhookMessage;
+use Utopia\Fetch\Client as FetchClient;
+use Utopia\Fetch\Exception as FetchException;
 use Utopia\Messaging\Adapter;
 use Utopia\Messaging\Message;
 use Utopia\Messaging\Response;
@@ -87,27 +89,36 @@ class Webhook extends Adapter
      */
     protected function dispatch(string $method, string $url, array $headers, string $body, int $timeout): array
     {
-        $handle = \curl_init();
-        \curl_setopt_array($handle, [
-            CURLOPT_CUSTOMREQUEST => $method,
-            CURLOPT_URL => $url,
-            CURLOPT_HTTPHEADER => $headers,
-            CURLOPT_POSTFIELDS => $body,
-            CURLOPT_RETURNTRANSFER => true,
-            CURLOPT_TIMEOUT => $timeout,
-            CURLOPT_CONNECTTIMEOUT => \min(10, $timeout),
-            CURLOPT_USERAGENT => 'Appwrite Webhook',
-        ]);
+        $client = new FetchClient();
+        $client
+            ->setTimeout($timeout * 1000)
+            ->setConnectTimeout(\min(10, $timeout) * 1000)
+            ->setAllowRedirects(false)
+            ->setUserAgent('Appwrite Webhook');
 
-        $output = \curl_exec($handle);
-        $statusCode = (int) \curl_getinfo($handle, CURLINFO_RESPONSE_CODE);
-        $error = \curl_error($handle);
-        \curl_close($handle);
+        foreach ($headers as $header) {
+            $parts = \explode(':', $header, 2);
+            if (\count($parts) === 2) {
+                $client->addHeader(\trim($parts[0]), \trim($parts[1]));
+            }
+        }
+
+        try {
+            $response = $client->fetch($url, $method, $body);
+        } catch (FetchException $exception) {
+            return [
+                'statusCode' => 0,
+                'response' => null,
+                'error' => $exception->getMessage(),
+            ];
+        }
+
+        $output = $response->getBody();
 
         return [
-            'statusCode' => $statusCode,
+            'statusCode' => $response->getStatusCode(),
             'response' => \is_string($output) ? $output : null,
-            'error' => $error !== '' ? $error : null,
+            'error' => null,
         ];
     }
 }