feat(FinalizeDocument): aus CommonJobs kopiert, mit einfachen Fehlerbehebungen unter Verwendung von Copilot

- Programmiersprache von VSC zu C# geändert
 - Framework von .NET Framework zu .NET geändert

EnvelopeGenerator.ServiceHost/Jobs/EnvelopeModel.cs

@@ -0,0 +1,42 @@
+using DigitalData.Modules.Base;
+using EnvelopeGenerator.Domain.Constants;
+using EnvelopeGenerator.Domain.Entities;
+
+namespace EnvelopeGenerator.ServiceHost.Jobs;
+
+public class EnvelopeModel : BaseModel
+{
+    public EnvelopeModel(State state) : base(state)
+    {
+    }
+
+    public Envelope? GetById(int envelopeId)
+    {
+        try
+        {
+            var sql = $"SELECT * FROM [dbo].[TBSIG_ENVELOPE] WHERE GUID = {envelopeId}";
+            var table = Database.GetDatatable(sql);
+            var row = table.Rows.Cast<System.Data.DataRow>().SingleOrDefault();
+            if (row is null)
+            {
+                return null;
+            }
+
+            return new Envelope
+            {
+                Id = row.ItemEx("GUID", 0),
+                Uuid = row.ItemEx("ENVELOPE_UUID", string.Empty),
+                FinalEmailToCreator = row.ItemEx("FINAL_EMAIL_TO_CREATOR", 0),
+                FinalEmailToReceivers = row.ItemEx("FINAL_EMAIL_TO_RECEIVERS", 0),
+                UserId = row.ItemEx("USER_ID", 0),
+                User = null!,
+                EnvelopeReceivers = new List<EnvelopeReceiver>()
+            };
+        }
+        catch (Exception ex)
+        {
+            Logger.Error(ex);
+            return null;
+        }
+    }
+}