[Fusion] Fix inlining of abstract type requirements

src/HotChocolate/Fusion/src/Fusion.Execution.Types/PlannerTopologyCache.cs

@@ -2,6 +2,7 @@
 using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
 using HotChocolate.Fusion.Types.Metadata;
+using HotChocolate.Types;
 
 namespace HotChocolate.Fusion.Types;
 
@@ -31,7 +32,10 @@ public static PlannerTopologyCache Build(FusionSchemaDefinition schema)
     {
         ArgumentNullException.ThrowIfNull(schema);
 
-        var complexTypes = schema.Types.AsEnumerable().OfType<FusionComplexTypeDefinition>().ToArray();
+        var complexTypes = schema.Types.AsEnumerable()
+            .OfType<FusionComplexTypeDefinition>()
+            .Where(t => !((ITypeDefinition)t).IsIntrospectionType)
+            .ToArray();
         var schemaNames = CollectSchemaNames(complexTypes);
         var fieldResolutions = BuildFieldResolutions(complexTypes);
         var orderedLookups = BuildOrderedLookups(schema, complexTypes, schemaNames);

src/HotChocolate/Fusion/src/Fusion.Execution/Planning/OperationPlanner.BuildExecutionTree.cs

@@ -24,7 +24,8 @@ private OperationPlan BuildExecutionPlan(
         OperationDefinitionNode operationDefinition,
         ImmutableList<PlanStep> planSteps,
         int searchSpace,
-        int expandedNodes)
+        int expandedNodes,
+        CancellationToken cancellationToken)
     {
         if (operation.IsIntrospectionOnly())
         {
@@ -44,7 +45,7 @@ private OperationPlan BuildExecutionPlan(
 
         planSteps = TransformPlanSteps(planSteps, operationDefinition);
         IndexDependencies(planSteps, ctx);
-        BuildExecutionNodes(planSteps, ctx, _schema, hasVariables);
+        BuildExecutionNodes(planSteps, ctx, _schema, hasVariables, cancellationToken);
         MergeAndBatchOperations(ctx, _options.EnableRequestGrouping, _options.MergePolicy);
         WireExecutionDependencies(ctx);
 
@@ -244,14 +245,17 @@ private static void BuildExecutionNodes(
         ImmutableList<PlanStep> planSteps,
         ExecutionPlanBuildContext ctx,
         ISchemaDefinition schema,
-        bool hasVariables)
+        bool hasVariables,
+        CancellationToken cancellationToken)
     {
         var requiresUpload = schema.Types.TryGetType(UploadScalarName, out var uploadType) && uploadType.IsScalarType();
         var readySteps = planSteps.Where(t => !ctx.DependenciesByStepId.ContainsKey(t.Id)).ToList();
         var variableBuffer = hasVariables ? new List<string>() : null;
 
         while (ctx.ProcessedStepIds.Count < planSteps.Count)
         {
+            cancellationToken.ThrowIfCancellationRequested();
+
             foreach (var step in readySteps)
             {
                 if (!ctx.ProcessedStepIds.Add(step.Id))