[Fusion] Fix inlining of abstract type requirements

[tobias-tengler]

No description provided.

[Copilot]

Pull request overview

Fixes Fusion operation planning when abstract-type requirements are inlined, especially across inline fragments/directive conditions, and updates the corresponding test snapshots.

Changes:

• Adjusts selection-set partitioning to merge child unresolvable entries back into the parent to avoid duplicate downstream lookups for abstract types.
• Extends operation planning with a fallback path to inline lookup requirements into the nearest ancestor plan step while preserving fragment structure.
• Adds/updates AspNetCore tests and snapshots to validate interface/abstract-type planning scenarios (including nested @skip) and removes redundant __typename selections from planned downstream operations.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/HotChocolate/Fusion/test/Fusion.Execution.Tests/Planning/snapshots/InterfaceLookupPlanningTests.Abstract_Customer_Interface_With_Email_Is_Plannable.yaml	Updates planned operations snapshot (removes redundant __typename selections).
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/ConditionalTests.cs	Adds regression test for interface type refinement under nested @skip.
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/AbstractTypeTests.cs	Adds multiple regression tests covering interface fields with/without type refinements (including aliasing and mismatch cases).
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/snapshots/ConditionalTests.Interface_Field_With_Type_Refinement_Under_Skip.yaml	New snapshot validating conditional inlining/requirements behavior.
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/snapshots/AbstractTypeTests.Interface_Field_Without_Type_Refinements_With_Interface_Lookup.yaml	Snapshot update removing redundant __typename within type refinement selections.
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/snapshots/AbstractTypeTests.Interface_Field_Without_Type_Refinements_With_Interface_Lookup_And_Field_From_Specific_Source.yaml	Snapshot update removing redundant __typename within type refinement selections.
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/snapshots/AbstractTypeTests.Interface_Field_Without_Type_Refinements_With_Concrete_Lookups.yaml	Snapshot update removing redundant __typename in concrete lookup operations and responses.
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/snapshots/AbstractTypeTests.Interface_Field_Without_Type_Refinements_With_Concrete_Lookups_And_Field_From_Specific_Source.yaml	Snapshot update removing redundant __typename in concrete lookup operations and responses.
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/snapshots/AbstractTypeTests.Interface_Field_With_And_Without_Type_Refinements_Type_Refinements_Do_Not_Match.yaml	New snapshot for “type refinements do not match” scenario.
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/snapshots/AbstractTypeTests.Interface_Field_With_And_Without_Type_Refinements_All_Fields_On_Dedicated_Schemas.yaml	New snapshot covering dedicated-schema resolution for interface + type refinements.
src/HotChocolate/Fusion/test/Fusion.AspNetCore.Tests/snapshots/AbstractTypeTests.Interface_Field_With_And_Without_Type_Refinements_Aliased_With_Different_Selections.yaml	New snapshot validating aliasing + differing selections across repeated interface fields.
src/HotChocolate/Fusion/src/Fusion.Execution/Planning/Partitioners/SelectionSetPartitioner.cs	Merges child unresolvable entries into parent unresolvable selections for abstract types; adjusts condition pop timing.
src/HotChocolate/Fusion/src/Fusion.Execution/Planning/OperationPlanner.cs	Adds fallback inlining via AST ancestor discovery and fragment wrapping; threads cancellation token into execution-plan build.
src/HotChocolate/Fusion/src/Fusion.Execution/Planning/OperationPlanner.BuildExecutionTree.cs	Propagates cancellation token and checks it during execution node construction.
src/HotChocolate/Fusion/src/Fusion.Execution.Types/PlannerTopologyCache.cs	Excludes introspection complex types from planner topology cache building.

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