Fix cloud assets not persisting between sessions

- Force LiteDB checkpoint after installing cloud packages to ensure data is persisted to disk before the editor closes
- Clean up stale file entries from old package revisions to prevent validation failures on restart
- Fix ValidatePackage to only validate files matching the current package revision

Author: trende2001

engine/Sandbox.Tools/Assets/CloudAssetDirectory.cs

@@ -91,8 +91,15 @@ public void Dispose()
 	public void AddPackage( Package package )
 	{
 		packages.DeleteMany( x => x.FullIdent == package.FullIdent );
+
+		// Clean up file entries from old revisions to prevent validation failures on restart
+		files.DeleteMany( x => x.Package == package.FullIdent && x.Revision != package.Revision.VersionId );
+
 		packages.Insert( package );
 
+		// Force checkpoint to ensure data is persisted to disk
+		db.Checkpoint();
+
 		packageCache[package.FullIdent] = package;
 	}
 
@@ -157,12 +164,15 @@ internal Package FindPackage( string ident )
 	}
 
 	/// <summary>
-	/// Validate that the files in this package are all present and correct. This is 
+	/// Validate that the files in this package are all present and correct. This is
 	/// done once when retriving the package.
 	/// </summary>
 	internal bool ValidatePackage( Package package )
 	{
-		return fileCache.Values.Where( x => x.Package == package.FullIdent ).AsParallel().All( x => FileSystem.Cloud.FileExists( x.Path ) );
+		return fileCache.Values
+			.Where( x => x.Package == package.FullIdent && x.Revision == package.Revision.VersionId )
+			.AsParallel()
+			.All( x => FileSystem.Cloud.FileExists( x.Path ) );
 	}
 
 	/// <summary>