Refactor Signature record and update EnvelopeReceiverController

- Removed default email assignment in Signature record.
- Eliminated unused using directive in EnvelopeReceiverController.
- Added new parameters for document execution and connection string options in the controller's constructor.

EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverDtos.cs

@@ -25,12 +25,12 @@ public record Signature([Required] double X, [Required] double Y, [Required] int
 /// <param name="PhoneNumber">Sollte mit Vorwahl geschrieben werden</param>
 public record ReceiverGetOrCreateCommand([Required] IEnumerable<Signature> Signatures, string? Salution = null, string? PhoneNumber = null)
 {
-    private string? _emailAddress = "h.tek@digitaldata.works";
+    private string? _emailAddress;
 
     /// <summary>
     /// E-Mail-Adresse des Empfängers.
     /// </summary>
-    public string? EmailAddress { get => _emailAddress?.ToLower(); init => _emailAddress = _emailAddress?.ToLower() ?? "h.tek@digitaldata.works"; }
+    public string? EmailAddress { get => _emailAddress?.ToLower(); init => _emailAddress = _emailAddress?.ToLower(); }
 };
 
 /// <summary>

EnvelopeGenerator.GeneratorAPI/Controllers/EnvelopeReceiverController.cs

@@ -15,7 +15,6 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.Data.SqlClient;
 using Microsoft.Extensions.Options;
 using System.Data;
-using System.Threading.Channels;
 
 namespace EnvelopeGenerator.GeneratorAPI.Controllers;
 
@@ -55,6 +54,8 @@ public class EnvelopeReceiverController : ControllerBase
     /// <param name="mapper"></param>
     /// <param name="envelopeExecutor"></param>
     /// <param name="erExecutor"></param>
+    /// <param name="documentExecutor"></param>
+    /// <param name="csOpt"></param>
     public EnvelopeReceiverController(ILogger<EnvelopeReceiverController> logger, IEnvelopeReceiverService envelopeReceiverService, IMediator mediator, IMapper mapper, IEnvelopeExecutor envelopeExecutor, IEnvelopeReceiverExecutor erExecutor, IDocumentExecutor documentExecutor, IOptions<ConnectionString> csOpt)
     {
         _logger = logger;