feat: implement migration tracking and history management for PostgreSQL

Emby.Server.Implementations/Library/LibraryManager.cs

@@ -1223,29 +1223,26 @@ namespace Emby.Server.Implementations.Library
         private async Task RunPostScanTasks(IProgress<double> progress, CancellationToken cancellationToken)
         {
             var tasks = PostScanTasks.ToList();
-
-            var numComplete = 0;
             var numTasks = tasks.Count;
 
-            foreach (var task in tasks)
+            if (numTasks == 0)
             {
-                // Prevent access to modified closure
-                var currentNumComplete = numComplete;
+                _itemRepository.UpdateInheritedValues();
+                progress.Report(100);
+                return;
+            }
 
+            var progressValues = new double[numTasks];
+
+            async Task RunOneTask(ILibraryPostScanTask task, int taskIndex)
+            {
+                _logger.LogDebug("Running post-scan task {0}", task.GetType().Name);
                 var innerProgress = new Progress<double>(pct =>
                 {
-                    double innerPercent = pct;
-                    innerPercent /= 100;
-                    innerPercent += currentNumComplete;
-
-                    innerPercent /= numTasks;
-                    innerPercent *= 100;
-
-                    progress.Report(innerPercent);
+                    progressValues[taskIndex] = pct;
+                    progress.Report(progressValues.Average());
                 });
 
-                _logger.LogDebug("Running post-scan task {0}", task.GetType().Name);
-
                 try
                 {
                     await task.Run(innerProgress, cancellationToken).ConfigureAwait(false);
@@ -1260,12 +1257,12 @@ namespace Emby.Server.Implementations.Library
                     _logger.LogError(ex, "Error running post-scan task");
                 }
 
-                numComplete++;
-                double percent = numComplete;
-                percent /= numTasks;
-                progress.Report(percent * 100);
+                progressValues[taskIndex] = 100;
+                progress.Report(progressValues.Average());
             }
 
+            await Task.WhenAll(tasks.Select((task, i) => RunOneTask(task, i))).ConfigureAwait(false);
+
             _itemRepository.UpdateInheritedValues();
 
             progress.Report(100);
@@ -1997,7 +1994,7 @@ namespace Emby.Server.Implementations.Library
         /// <inheritdoc />
         public void CreateItems(IReadOnlyList<BaseItem> items, BaseItem? parent, CancellationToken cancellationToken)
         {
-            _itemRepository.SaveItems(items, cancellationToken);
+            _itemRepository.SaveItemsAsync(items, cancellationToken).GetAwaiter().GetResult();
 
             foreach (var item in items)
             {
@@ -2165,7 +2162,7 @@ namespace Emby.Server.Implementations.Library
                 item.DateLastSaved = DateTime.UtcNow;
             }
 
-            _itemRepository.SaveItems(items, cancellationToken);
+            await _itemRepository.SaveItemsAsync(items, cancellationToken).ConfigureAwait(false);
 
             if (parent is Folder folder)
             {