refac: APIHelper에 DummySession 적용, NO_LOGIN 구분

hwe/sammo/API/Global/GetCachedMap.php

@@ -41,7 +41,7 @@ class GetCachedMap extends \sammo\BaseAPI
 
   public function getRequiredSessionMode(): int
   {
-    return static::NO_SESSION;
+    return static::DUMMY_SESSION;
   }
 
   public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)

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