backend/Tnsu.ApprovalRoute.Application/RequestManage/RequestManageService.cs

@@ -152,13 +152,21 @@ public sealed class RequestManageService(
         var statusFilter = string.Join(" or ", activeStatuses.Select(s => $"{StatusField} eq '{Escape(s)}'"));
         var email = approverEmail.Trim();
 
+        // DbContext не потокобезопасен: архивные партиции читаем из БД ПОСЛЕДОВАТЕЛЬНО,
+        // и только дальнейшее чтение SharePoint (без БД) идёт параллельно. Раньше
+        // GetArchivedAsync вызывался из параллельных задач — «вторая операция на
+        // контексте» падала, а пустой catch превращал это в пустой список.
+        var archivedByType = new Dictionary<int, IReadOnlyList<RequestListPartition>>();
+        foreach (var rt in requestTypes)
+            archivedByType[rt.Id] = await partitionRegistry.GetArchivedAsync(rt, cancellationToken);
+
         using var gate = new SemaphoreSlim(MaxParallelTypes);
         var results = await Task.WhenAll(requestTypes.Select(async rt =>
         {
             await gate.WaitAsync(cancellationToken);
             try
             {
-                return await FindForTypeSafeAsync(rt, statusFilter, email, cancellationToken);
+                return await FindForTypeSafeAsync(rt, archivedByType[rt.Id], statusFilter, email, cancellationToken);
             }
             finally
             {
@@ -170,11 +178,11 @@ public sealed class RequestManageService(
     }
 
     private async Task<IReadOnlyList<UserApprovalRowDto>> FindForTypeSafeAsync(
-        RequestType requestType, string statusFilter, string approverEmail, CancellationToken cancellationToken)
+        RequestType requestType, IReadOnlyList<RequestListPartition> archived, string statusFilter, string approverEmail, CancellationToken cancellationToken)
     {
         try
         {
-            return await FindForTypeAsync(requestType, statusFilter, approverEmail, cancellationToken);
+            return await FindForTypeAsync(requestType, archived, statusFilter, approverEmail, cancellationToken);
         }
         catch (Exception ex) when (ex is not OperationCanceledException)
         {
@@ -186,10 +194,9 @@ public sealed class RequestManageService(
     }
 
     private async Task<IReadOnlyList<UserApprovalRowDto>> FindForTypeAsync(
-        RequestType requestType, string statusFilter, string approverEmail, CancellationToken cancellationToken)
+        RequestType requestType, IReadOnlyList<RequestListPartition> archived, string statusFilter, string approverEmail, CancellationToken cancellationToken)
     {
         var siteUrl = requestType.SiteUrl!;
-        var archived = await partitionRegistry.GetArchivedAsync(requestType, cancellationToken);
         var current = await partitionRegistry.BuildCurrentAsync(requestType, archived, cancellationToken);
 
         var partitions = archived