Fix pylint issues in transports and vumark_service

Make VuMarkService.__init__ keyword-only to fix
too-many-positional-arguments. Suppress unnecessary-ellipsis
on Transport protocol method body.

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

Author: adamtheturtle

src/vws/transports.py

@@ -42,7 +42,7 @@ def __call__(
         Returns:
             A Response populated from the HTTP response.
         """
-        ...
+        ...  # pylint: disable=unnecessary-ellipsis
 
 
 @beartype(conf=BeartypeConf(is_pep484_tower=True))

src/vws/vumark_service.py

@@ -30,6 +30,7 @@ class VuMarkService:
 
     def __init__(
         self,
+        *,
         server_access_key: str,
         server_secret_key: str,
         base_vws_url: str = "https://vws.vuforia.com",