Composite group id used when PointKind is Composite.
This gameplay tag value (FGameplayTag) belongs to FInteractionRuntimePointDefinition under InteractionRuntime|Composite.
Designers configure this value in the owning asset or object details panel, while Blueprint logic can read the resolved value at runtime.
UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "InteractionRuntime|Composite", meta = (Categories = "Interaction.CompositeGroup", EditCondition = "PointKind == EInteractionRuntimePointKind::Composite", EditConditionHides))
FGameplayTag CompositeGroupId;