Change Scope for WorkflowPurger

Author: viktorkryzhanovksyilangai

src/providers/WorkflowCore.Providers.Azure/ServiceCollectionExtensions.cs

@@ -40,7 +40,7 @@ public static WorkflowOptions UseCosmosDbPersistence(
 
             options.Services.AddSingleton<ICosmosClientFactory>(sp => new CosmosClientFactory(connectionString));
             options.Services.AddTransient<ICosmosDbProvisioner>(sp => new CosmosDbProvisioner(sp.GetService<ICosmosClientFactory>(), cosmosDbStorageOptions));
-            options.Services.AddTransient<IWorkflowPurger>(sp => new WorkflowPurger(sp.GetService<ICosmosClientFactory>(), databaseId, cosmosDbStorageOptions));
+            options.Services.AddSingleton<IWorkflowPurger>(sp => new WorkflowPurger(sp.GetService<ICosmosClientFactory>(), databaseId, cosmosDbStorageOptions));
             options.UsePersistence(sp => new CosmosDbPersistenceProvider(sp.GetService<ICosmosClientFactory>(), databaseId, sp.GetService<ICosmosDbProvisioner>(), cosmosDbStorageOptions));
             return options;
         }