feat(infrastructure): refactor DIExtensions for DbContext registration

* Removed `dbContextOptions` parameter from `AddEnvelopeGeneratorInfrastructureServices`
* Moved `AddDbContext` registration into `Config` class with overloads for both `Action<DbContextOptionsBuilder>` and `Action<IServiceProvider, DbContextOptionsBuilder>`
* Simplified service registration flow and improved extensibility

EnvelopeGenerator.Web/Program.cs

@@ -104,14 +104,17 @@ try
     // Add envelope generator services
 #pragma warning disable CS0618 // Type or member is obsolete
     builder.Services.AddEnvelopeGeneratorInfrastructureServices(
-        opt => opt.ConfigureDbTriggerParams(config),
-        (provider, options) =>
+        opt =>
         {
-            var logger = provider.GetRequiredService<ILogger<EGDbContext>>();
-            options.UseSqlServer(connStr)
-                    .LogTo(log => logger.LogInformation("{log}", log), Microsoft.Extensions.Logging.LogLevel.Trace)
-                    .EnableSensitiveDataLogging()
-                    .EnableDetailedErrors();
+            opt.ConfigureDbTriggerParams(config);
+            opt.AddDbContext((provider, options) =>
+            {
+                var logger = provider.GetRequiredService<ILogger<EGDbContext>>();
+                options.UseSqlServer(connStr)
+                        .LogTo(log => logger.LogInformation("{log}", log), Microsoft.Extensions.Logging.LogLevel.Trace)
+                        .EnableSensitiveDataLogging()
+                        .EnableDetailedErrors();
+            });
         });
 #pragma warning restore CS0618 // Type or member is obsolete