Expand module contracts for references and normalizer LLM access

internal/modules/chunk/dnd/scenes/chunker.go

@@ -34,6 +34,10 @@ func (c *Chunker) Key() string {
 	return Key
 }
 
+func (c *Chunker) ReferenceSlots() []contracts.ReferenceSlot {
+	return nil
+}
+
 func (c *Chunker) ManifestMetadata() map[string]any {
 	promptMetadata := scenesPromptBundle.Metadata()
 	metadata := map[string]any{

internal/modules/chunk/dnd/scenes/chunker_test.go

@@ -57,6 +57,9 @@ func TestNewModuleSpecAndRegister(t *testing.T) {
 	if built.Key() != Key {
 		t.Fatalf("built Key() = %q, want %q", built.Key(), Key)
 	}
+	if slots := built.ReferenceSlots(); len(slots) != 0 {
+		t.Fatalf("ReferenceSlots() = %#v, want none", slots)
+	}
 }
 
 func TestRegisterNilRegistryReturnsError(t *testing.T) {