Use the current highwater mark for config fetches

Author: jkebinger

prefab_cloud_python/config_client.py

@@ -157,8 +157,9 @@ def load_initial_data(self):
 
     def load_checkpoint_from_api_cdn(self):
         try:
+            hwm = self.config_loader.highwater_mark
             response = self.api_client.resilient_request(
-                "/api/v1/configs/0", auth=("authuser", self.options.api_key), timeout=4, allow_cache=True
+                f"/api/v1/configs/" + str(hwm), auth=("authuser", self.options.api_key), timeout=4, allow_cache=True
             )
             if response.ok:
                 configs = Prefab.Configs.FromString(response.content)