Send X-Go-White-Label-ID header

Send the hardcoded West Wood white-label tenant ID on API requests, matching
the app. The server doesn't require it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

custom_components/west_wood_club/manifest.json

@@ -7,5 +7,5 @@
   "integration_type": "service",
   "iot_class": "cloud_polling",
   "requirements": [],
-  "version": "0.1.2"
+  "version": "0.1.3"
 }