Handles exceptions when loading service config

Improves the robustness of the service configuration loading process by catching potential exceptions.

Specifically, it catches exceptions when attempting to access the AppData path and unauthorized access exceptions when reading the service configuration file. This prevents the service from crashing and provides more informative error messages to the user.

Author: webprofusion-chrisc

src/Certify.Shared/Utils/ServiceConfigManager.cs

@@ -20,7 +20,18 @@ public static ServiceConfig GetAppServiceConfig()
                 ConfigStatus = ConfigStatus.DefaultFailed
             };
 
-            var appDataPath = EnvironmentUtil.EnsuredAppDataPath();
+            var appDataPath = string.Empty;
+            try
+            {
+                appDataPath = EnvironmentUtil.EnsuredAppDataPath();
+            }
+            catch (Exception exp)
+            {
+                System.Console.WriteLine($"ServiceConfigManager: Failed to get AppData path. {exp.Message}");
+                serviceConfig.ServiceFaultMsg = $"Failed to get AppData path. {exp.Message}";
+                return serviceConfig;
+            }
+
             var serviceConfigFile = Path.Combine(appDataPath, "serviceconfig.json");
 #if DEBUG
             serviceConfigFile = Path.Combine(appDataPath, "serviceconfig.debug.json");
@@ -51,6 +62,12 @@ public static ServiceConfig GetAppServiceConfig()
 
                 }
             }
+            catch (UnauthorizedAccessException uaExp)
+            {
+                serviceConfig.ConfigStatus = ConfigStatus.DefaultFailed;
+                serviceConfig.ServiceFaultMsg = $"Access denied to service configuration file at {serviceConfigFile}. {uaExp.Message}";
+                System.Console.WriteLine($"ServiceConfigManager: {serviceConfig.ServiceFaultMsg}");
+            }
             catch (Exception exp)
             {
                 if (serviceConfig != null)