Register JobStateManager as singleton in DI container

JobStateManager is now added as a singleton service, initialized with the InitialJobState from WorkerOptions. This enables consistent state management across the application by providing a shared instance via dependency injection.

EnvelopeGenerator.ServiceHost/Extensions/DependencyInjection.cs

@@ -11,6 +11,12 @@ public static class DependencyInjection
     public static IServiceCollection AddFinalizeDocumentJob(this IServiceCollection services, IConfiguration configuration)
     {
         services.Configure<WorkerOptions>(configuration.GetSection("Worker"));
+        services.AddSingleton(provider =>
+        {
+            var options = provider.GetRequiredService<IOptions<WorkerOptions>>().Value;
+            var manager = new JobStateManager(options.InitialJobState);
+            return manager;
+        });
         services.AddScoped<FinalizeDocumentJob>();
         services.AddScoped<ActionService>();
         services.AddSingleton<TempFiles>();