fix: resolve psalm psr http client dependency

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

psalm.xml

@@ -45,5 +45,6 @@
     </issueHandlers>
     <stubs>
         <file name="tests/stubs/oc_hooks_emitter.php" />
+        <file name="tests/stubs/psr_http_client.php" />
     </stubs>
 </psalm>

tests/stubs/psr_http_client.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace Psr\Http\Client {
+	/**
+	 * Minimal Psalm stub to satisfy OCP\Http\Client\IClient dependency.
+	 */
+	interface ClientInterface {
+	}
+}