refactor(di): unify Application and Infrastructure DI registrations under a central method

- Added central AddEnvelopeGenerator extension to aggregate existing DI setups
- Introduced EGConfiguration for modular service registration
- Standardized configuration pattern for Application and Infrastructure layers
- Simplified distributed cache and localization registration

EnvelopeGenerator.Web/Program.cs

@@ -1,4 +1,3 @@
-using EnvelopeGenerator.Application.Services;
 using Microsoft.EntityFrameworkCore;
 using NLog;
 using Quartz;
@@ -16,7 +15,6 @@ using EnvelopeGenerator.Web.Sanitizers;
 using EnvelopeGenerator.Web.Models.Annotation;
 using DigitalData.UserManager.DependencyInjection;
 using EnvelopeGenerator.Web.Middleware;
-using EnvelopeGenerator.Application.Common.Interfaces.Services;
 
 var logger = LogManager.Setup().LoadConfigurationFromAppSettings().GetCurrentClassLogger();
 logger.Info("Logging initialized!");
@@ -103,7 +101,7 @@ try
 
     // Add envelope generator services
 #pragma warning disable CS0618 // Type or member is obsolete
-    builder.Services.AddEnvelopeGeneratorInfrastructureServices(
+    builder.Services.AddEGInfrastructureServices(
         opt =>
         {
             opt.AddDbTriggerParams(config);
@@ -186,11 +184,6 @@ try
     builder.Services.Configure<Cultures>(config.GetSection("Cultures"));
     builder.Services.AddSingleton(sp => sp.GetRequiredService<IOptions<Cultures>>().Value);
 
-    // Register mail services
-#pragma warning disable CS0618 // Type or member is obsolete
-    builder.Services.AddScoped<IEnvelopeMailService, EnvelopeMailService>();
-#pragma warning restore CS0618 // Type or member is obsolete
-
     builder.Services.AddDispatcher<EGDbContext>();
 
     builder.ConfigureBySection<CustomImages>();