Refactor DI for Envelope services and add new executor

Updated DIExtensions to register IEnvelopeExecutor as a singleton and added IEnvelopeReceiverExecutor as a new singleton service. Introduced IEnvelopeReceiverExecutor interface and implemented it in the new EnvelopeReceiverExecutor class for future envelope processing functionality.

EnvelopeGenerator.Application/Contracts/SQLExecutor/IEnvelopeReceiverExecutor.cs

@@ -0,0 +1,8 @@
+namespace EnvelopeGenerator.Application.Contracts.SQLExecutor;
+
+/// <summary>
+/// 
+/// </summary>
+public interface IEnvelopeReceiverExecutor
+{
+}

EnvelopeGenerator.Infrastructure/DependencyExtensions.cs

@@ -82,7 +82,8 @@ public static class DIExtensions
         SetDapperTypeMap<DocumentReceiverElement>();
         SetDapperTypeMap<DocumentStatus>();
 
-        services.AddScoped<IEnvelopeExecutor, EnvelopeExecutor>();
+        services.AddSingleton<IEnvelopeExecutor, EnvelopeExecutor>();
+        services.AddSingleton<IEnvelopeReceiverExecutor, EnvelopeReceiverExecutor>();
 
         if (sqlExecutorConfiguration is not null || sqlExecutorConfigureOptions is not null)
             services.AddSQLExecutor(sqlExecutorConfiguration, sqlExecutorConfigureOptions);

EnvelopeGenerator.Infrastructure/Executor/EnvelopeReceiverExecutor.cs

@@ -0,0 +1,7 @@
+using EnvelopeGenerator.Application.Contracts.SQLExecutor;
+
+namespace EnvelopeGenerator.Infrastructure.Executor;
+
+public class EnvelopeReceiverExecutor: IEnvelopeReceiverExecutor
+{
+}