Enhance DTOs and controller with documentation and checks

- Added XML documentation comments to properties in `EnvelopeHistoryDto.cs`.
- Changed `EnvelopeId` to non-nullable in `ReadHistoryQuery.cs` and added `Status` parameter for filtering.
- Removed unused `using` directives in `HistoryController.cs` and updated `GetAllAsync` to filter histories by `Status`, returning `NotFound` if no results are found.

EnvelopeGenerator.Application/DTOs/EnvelopeHistory/EnvelopeHistoryDto.cs

@@ -5,19 +5,32 @@ using EnvelopeGenerator.Application.DTOs.Receiver;
 using Microsoft.AspNetCore.Mvc;
 using static EnvelopeGenerator.Common.Constants;
 
-namespace EnvelopeGenerator.Application.DTOs.EnvelopeHistory
-{
-    [ApiExplorerSettings(IgnoreApi = true)]
-    public record EnvelopeHistoryDto(
-        long Id,
-        int EnvelopeId,
-        string UserReference,
-        int Status,
-        string? StatusName,
-        DateTime AddedWhen,
-        DateTime? ActionDate,
-        UserCreateDto? Sender,
-        ReceiverReadDto? Receiver,
-        ReferenceType ReferenceType,
-        string? Comment = null) : BaseDTO<long>(Id), IUnique<long>;
-}
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeHistory;
+
+/// <summary>
+/// 
+/// </summary>
+/// <param name="Id"></param>
+/// <param name="EnvelopeId"></param>
+/// <param name="UserReference"></param>
+/// <param name="Status"></param>
+/// <param name="StatusName"></param>
+/// <param name="AddedWhen"></param>
+/// <param name="ActionDate"></param>
+/// <param name="Sender"></param>
+/// <param name="Receiver"></param>
+/// <param name="ReferenceType"></param>
+/// <param name="Comment"></param>
+[ApiExplorerSettings(IgnoreApi = true)]
+public record EnvelopeHistoryDto(
+    long Id,
+    int EnvelopeId,
+    string UserReference,
+    int Status,
+    string? StatusName,
+    DateTime AddedWhen,
+    DateTime? ActionDate,
+    UserCreateDto? Sender,
+    ReceiverReadDto? Receiver,
+    ReferenceType ReferenceType,
+    string? Comment = null) : BaseDTO<long>(Id), IUnique<long>;

EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryQuery.cs

@@ -1,6 +1,4 @@
-using EnvelopeGenerator.Application.Envelopes.Queries.Read;
-using EnvelopeGenerator.Application.Receivers.Queries.Read;
-using EnvelopeGenerator.Common;
+using EnvelopeGenerator.Common;
 
 namespace EnvelopeGenerator.Application.Histories.Queries.Read;
 
@@ -9,9 +7,11 @@ namespace EnvelopeGenerator.Application.Histories.Queries.Read;
 /// Repräsentiert eine Abfrage für die Verlaufshistorie eines Umschlags.
 /// </summary>
 /// <param name="EnvelopeId">Die eindeutige Kennung des Umschlags.</param>
+/// <param name="Status">Der Status des Umschlags, der abgefragt werden soll. Kann optional angegeben werden, um die Ergebnisse zu filtern.</param>
 /// <param name="Related">Abfrage, die angibt, worauf sich der Datensatz bezieht. Ob er sich auf den Empfänger, den Sender oder das System bezieht, wird durch 0, 1 bzw. 2 dargestellt.</param>
 /// <param name="OnlyLast">Abfrage zur Steuerung, ob nur der aktuelle Status oder der gesamte Datensatz zurückgegeben wird.</param>
 public record ReadHistoryQuery(
-    int? EnvelopeId = null,
+    int EnvelopeId,
+    Constants.EnvelopeStatus? Status = null,
     Constants.ReferenceType? Related = null,
     bool? OnlyLast = true);

EnvelopeGenerator.GeneratorAPI/Controllers/HistoryController.cs

@@ -1,5 +1,4 @@
-using DigitalData.EmailProfilerDispatcher.Abstraction.Entities;
-using EnvelopeGenerator.Application.Contracts.Services;
+using EnvelopeGenerator.Application.Contracts.Services;
 using EnvelopeGenerator.Application.Histories.Queries.Read;
 using EnvelopeGenerator.Extensions;
 using Microsoft.AspNetCore.Authorization;
@@ -7,7 +6,6 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Caching.Memory;
 using static EnvelopeGenerator.Common.Constants;
 
-
 namespace EnvelopeGenerator.GeneratorAPI.Controllers;
 
 /// <summary>
@@ -109,8 +107,6 @@ public class HistoryController : ControllerBase
     [Authorize]
     public async Task<IActionResult> GetAllAsync([FromQuery] ReadHistoryQuery history)
     {
-
-
         bool withReceiver = false;
         bool withSender = false;
 
@@ -130,6 +126,12 @@ public class HistoryController : ControllerBase
             withSender: withSender,
             withReceiver: withReceiver);
 
-        return Ok(histories);
+        if(history.Status is not null)
+            histories = histories.Where(h => h.Status == (int)history.Status);
+
+        if (!histories.Any())
+            return NotFound();
+
+        return Ok((history.OnlyLast ?? false) ? histories.MaxBy(h => h.AddedWhen) : histories);
     }
 }