[verified] Harden Etsy MCP validation and scheduled token refresh

tests/Feature/SchedulerTest.php

@@ -67,7 +67,24 @@ class SchedulerTest extends TestCase
         $this->assertNotNull($sync);
         $this->assertNotNull($tokenRefresh);
         $this->assertSame('*/15 * * * *', $sync->expression);
-        $this->assertSame('*/45 * * * *', $tokenRefresh->expression);
+        $this->assertSame('*/5 * * * *', $tokenRefresh->expression);
+    }
+
+    public function test_etsy_stale_overlap_locks_expire_within_five_minutes(): void
+    {
+        $this->freezeTime();
+        $events = collect(app(Schedule::class)->events())
+            ->filter(fn ($event): bool => str_contains((string) $event->command, 'etsy:'));
+
+        foreach ($events as $event) {
+            $this->assertTrue($event->mutex->create($event));
+            $this->assertTrue($event->mutex->exists($event));
+        }
+        $this->travel(6)->minutes();
+
+        foreach ($events as $event) {
+            $this->assertFalse($event->mutex->exists($event));
+        }
     }
 
     public function test_changing_a_stored_frequency_changes_what_gets_scheduled(): void