feat: подробное отображение ошибок синхронизации

backend/UniVerse.Application/DTOs/Sync/SyncDtos.cs

@@ -7,7 +7,13 @@ public record SyncScheduleRequest(
     IReadOnlyList<string>? TypeId
 );
 
-public record SyncResultDto(int Created, int Updated, int Skipped, string? Error);
+public record SyncResultDto(
+    int Created,
+    int Updated,
+    int Skipped,
+    string? Error,
+    IReadOnlyList<string>? Details = null
+);
 
 public record SyncStatusDto(DateTime? LastSyncAt, string Status, SyncResultDto? LastResult);