add some debug logging

Pilz.Net/Api/ApiClient.cs

@@ -65,13 +65,19 @@ public class ApiClient(string apiUrl) : IApiClient
         var url = ApiUrl + route;
         HttpContent content;
 
+        Log.DebugFormat("Api endpoint url is {0}", url);
+
         if (message is not null)
             content = new StringContent(serializer.Serialize(message)!, null, "application/json");
         else
             content = new StringContent(string.Empty, null, "application/json");
 
+        Log.Debug("Content created.");
+
         content.Headers.Add("API-AUTH-KEY", EncodeAuthKey());
 
+        Log.Debug("Sending request...");
+
         return await httpClient.PostAsync(url, content);
     }