Minimize D&D NPC extraction contracts

internal/modules/dnd/extract/npcs/canonicalize.go

@@ -98,35 +98,14 @@ func canonicalNPCList(response extractionResponse, sourceID string) dnd.NPCList
 	npcs := make([]dnd.NPC, len(response.NPCs))
 	for index, npc := range response.NPCs {
 		npcs[index] = dnd.NPC{
-			ID:            identity.DeriveID(npc.Name),
-			Name:          npc.Name,
-			Aliases:       cloneStrings(npc.Aliases),
-			Description:   npc.Description,
-			Relationships: cloneRelationships(npc.Relationships),
-			SourceRefs:    canonicalSourceRefs(npc.SourceRefs, sourceID),
+			ID:         identity.DeriveID(npc.Name),
+			Name:       npc.Name,
+			SourceRefs: canonicalSourceRefs(npc.SourceRefs, sourceID),
 		}
 	}
 	return dnd.NPCList{NPCs: npcs}
 }
 
-func cloneStrings(values []string) []string {
-	if values == nil {
-		return nil
-	}
-	return append([]string{}, values...)
-}
-
-func cloneRelationships(values []npcRelationshipResponse) []dnd.NPCRelationship {
-	if values == nil {
-		return nil
-	}
-	out := make([]dnd.NPCRelationship, len(values))
-	for index, value := range values {
-		out[index] = dnd.NPCRelationship{Target: value.Target, Relationship: value.Relationship}
-	}
-	return out
-}
-
 func canonicalSourceRefs(values []npcSourceRefResponse, sourceID string) []source.SourceRef {
 	if values == nil {
 		return nil