Mock SatisService in tests to fix CI TypeError

SatisService constructor requires non-nullable string properties from
config, which are null in CI. Mock it instead since Satis is not
exercised in these tests.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: simonhamp

tests/Feature/Jobs/SyncPluginReleasesTest.php

@@ -41,8 +41,10 @@ public function test_it_updates_latest_version_on_plugin_when_new_releases_are_s
             'latest_version' => '0.9.0',
         ]);
 
+        $satisService = $this->mock(SatisService::class);
+
         $job = new SyncPluginReleases($plugin, triggerSatisBuild: false);
-        $job->handle(app(SatisService::class));
+        $job->handle($satisService);
 
         $plugin->refresh();
 
@@ -79,8 +81,10 @@ public function test_it_does_not_update_latest_version_when_no_new_releases(): v
             'published_at' => '2026-01-01T00:00:00Z',
         ]);
 
+        $satisService = $this->mock(SatisService::class);
+
         $job = new SyncPluginReleases($plugin, triggerSatisBuild: false);
-        $job->handle(app(SatisService::class));
+        $job->handle($satisService);
 
         $plugin->refresh();