Expand module contracts for references and normalizer LLM access

internal/framework/contracts/contracts_test.go

@@ -378,6 +378,10 @@ func (chunker fakeChunker) Key() string {
 	return chunker.key
 }
 
+func (chunker fakeChunker) ReferenceSlots() []ReferenceSlot {
+	return nil
+}
+
 func (chunker fakeChunker) Chunk(ctx context.Context, req ChunkRequest) (ChunkResult, error) {
 	return ChunkResult{
 		Chunks: []SourceChunk{
@@ -400,6 +404,10 @@ func (chunker *recordingChunker) Key() string {
 	return chunker.key
 }
 
+func (chunker *recordingChunker) ReferenceSlots() []ReferenceSlot {
+	return nil
+}
+
 func (chunker *recordingChunker) Chunk(ctx context.Context, req ChunkRequest) (ChunkResult, error) {
 	chunker.request = req
 	return fakeChunker{key: chunker.key}.Chunk(ctx, req)
@@ -487,6 +495,10 @@ func (normalizer fakeNormalizer) Key() string {
 	return normalizer.key
 }
 
+func (normalizer fakeNormalizer) ReferenceSlots() []ReferenceSlot {
+	return nil
+}
+
 func (normalizer fakeNormalizer) Normalize(ctx context.Context, req NormalizeRequest) (NormalizeResult, error) {
 	return NormalizeResult{Candidates: req.Candidates}, nil
 }