Expand module contracts for references and normalizer LLM access

internal/framework/contracts/composition_test.go

@@ -162,6 +162,10 @@ func (chunker compositionChunker) Key() string {
 	return "generic-chunker"
 }
 
+func (chunker compositionChunker) ReferenceSlots() []contracts.ReferenceSlot {
+	return nil
+}
+
 func (chunker compositionChunker) Chunk(ctx context.Context, req contracts.ChunkRequest) (contracts.ChunkResult, error) {
 	if req.Source == nil {
 		return contracts.ChunkResult{}, errors.New("source document is required")
@@ -264,6 +268,10 @@ func (normalizer compositionNormalizer) Key() string {
 	return "generic-normalizer"
 }
 
+func (normalizer compositionNormalizer) ReferenceSlots() []contracts.ReferenceSlot {
+	return nil
+}
+
 func (normalizer compositionNormalizer) Normalize(ctx context.Context, req contracts.NormalizeRequest) (contracts.NormalizeResult, error) {
 	return contracts.NormalizeResult{Candidates: req.Candidates}, nil
 }