Server: start a retried write transaction from the database, not from the attempt that failed

src/DodoSSH.Api/Features/Sync/SyncService.cs

@@ -100,9 +100,7 @@ internal sealed class SyncService(
     {
         ValidateBatchLimits(request);
 
-        var strategy = database.Database.CreateExecutionStrategy();
-
-        return await strategy.ExecuteAsync(async () =>
+        return await database.ExecuteFreshAsync([vault], async () =>
         {
             var transaction = await database.Database
                 .BeginTransactionAsync(cancellationToken)