Refactor asset streaming, error handling, and unit tests

- Add new compile-time constants and update package versions
- Refactor AssetEntry upload logic to return Result and propagate errors
- Enhance error handling in ResourceStreamingProcessor uploads
- Make ResourceStreamingContext a readonly struct
- Implement IDisposable and finalizers for resource cleanup
- Overhaul AssetManagerTest with async tests and improved mocks
- Add mock implementations for graphics interfaces for testing
- Refactor MockingCommandBuffer and MockingResourceDatabase for better simulation
- Update internals visibility for unit testing

src/Runtime/Ghost.Engine/AssetManager.cs

@@ -1,7 +1,6 @@
 using Ghost.Core;
 using Ghost.Core.Utilities;
 using Ghost.Graphics;
-using Ghost.Graphics.Core;
 using Ghost.Graphics.RHI;
 using Misaki.HighPerformance.Jobs;
 using Misaki.HighPerformance.LowLevel;
@@ -54,7 +53,7 @@ internal partial class AssetEntry
 {
     private static readonly Action<AssetEntry>[] s_onCreation = new Action<AssetEntry>[(int)AssetType.Unknown + 1];
     private static readonly Func<AssetEntry, Result>[] s_onParseRawData = new Func<AssetEntry, Result>[(int)AssetType.Unknown + 1];
-    private static readonly Action<AssetEntry, ResourceStreamingContext>[] s_onRecordUpload = new Action<AssetEntry, ResourceStreamingContext>[(int)AssetType.Unknown + 1];
+    private static readonly Func<AssetEntry, ResourceStreamingContext, Result>[] s_onRecordUpload = new Func<AssetEntry, ResourceStreamingContext, Result>[(int)AssetType.Unknown + 1];
     private static readonly Action<AssetEntry, ResourceStreamingContext>[] s_onUploadComplete = new Action<AssetEntry, ResourceStreamingContext>[(int)AssetType.Unknown + 1];
     private static readonly Action<AssetEntry>[] s_onReleaseResource = new Action<AssetEntry>[(int)AssetType.Unknown + 1];
 
@@ -184,9 +183,9 @@ internal unsafe partial class AssetEntry
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public void OnRecordUploadCommands(ResourceStreamingContext context)
+    public Result OnRecordUploadCommands(ResourceStreamingContext context)
     {
-        s_onRecordUpload[(int)_assetType]?.Invoke(this, context);
+        return s_onRecordUpload[(int)_assetType]?.Invoke(this, context) ?? Result.Failure("Unsupported asset type.");
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -417,10 +416,10 @@ internal partial class AssetManager : IDisposable
 
         if (Interlocked.CompareExchange(ref entry.StateValue, (int)AssetState.Scheduled, (int)AssetState.Ready) == (int)AssetState.Ready)
         {
-            // Entry is in Ready state — the old texture is valid and will remain visible.
-            // Go directly to Scheduled → Loading → Loaded → Uploading → Ready again.
+            // Entry is in Ready state - the old texture is valid and will remain visible.
+            // Go directly to Scheduled -> Loading -> Loaded -> Uploading -> Ready again.
             // The swap cycle in RecordTextureUpload/OnTextureUploadComplete handles the 
-            // v1 → v2 transition exactly like the fallback → v1 transition.
+            // v1 to v2 transition exactly like the fallback to v1 transition.
             EnsureScheduled(entry);
         }
         else

src/Runtime/Ghost.Engine/ResourceStreamingProcessor.cs

@@ -62,17 +62,26 @@ internal class ResourceStreamingProcessor : IResourceStreamingProcessor
             }
 
             // Record copy commands into cmdCopy
-            entry.OnRecordUploadCommands(context);
+            if (entry.OnRecordUploadCommands(context).IsFailure)
+            {
+                Logger.Error($"Failed to record upload commands for asset {entry.AssetId}. Skipping upload.");
+                continue;
+            }
+
             entry.State = AssetState.Uploading;
 
             _pendingFinalize.Enqueue(entry);
             uploadCount++;
         }
 
-        var result = context.CopyPipeline.End();
-
         // 3. Submit the batch
-        if (uploadCount > 0 && result.IsSuccess)
+        if (context.CopyPipeline.End().IsFailure)
+        {
+            Logger.Error("Failed to submit copy command list for resource streaming.");
+            return;
+        }
+
+        if (uploadCount > 0)
         {
             _pendingCopyFenceValue = context.CopyPipeline.SignaledFenceValue();
         }