refac: APIHelper에 DummySession 적용, NO_LOGIN 구분

hwe/sammo/API/Global/GetConst.php

@@ -32,7 +32,7 @@ class GetConst extends \sammo\BaseAPI
 
     public function getRequiredSessionMode(): int
     {
-        return static::REQ_LOGIN | static::REQ_READ_ONLY;
+        return static::DUMMY_SESSION;
     }
 
     public function findLastModified(): ?int