Function finalize_with_diagnostic_damage 

pub fn finalize_with_diagnostic_damage(
    draft: CombatSystemDraft,
    rotation: &Rotation,
    damage_spell_ids: &[u32],
) -> Result<BuiltCombatSystem, EngineError>

Finalize a synthetic fixture after declaring every raw damage identity it executes.

The declarations still pass through the production finalizer. They become opaque, program-bound actions. This helper is unavailable without test support.

Errors

Returns an error when the synthetic draft cannot be finalized.