Enable correction-aware foundational D&D producers

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

@@ -22,12 +22,13 @@ func TestNewModuleSpecAndRegister(t *testing.T) {
 	}
 
 	want := pipeline.ModuleSpec{
-		Key:            Key,
-		Stage:          pipeline.StageChunk,
-		ExecutionClass: contracts.ExecutionClassLLMBacked,
-		Requires:       []string{"source.transcript"},
-		Provides:       []string{"chunks"},
-		ReferenceSlots: wantReferenceSlots(),
+		Key:                Key,
+		Stage:              pipeline.StageChunk,
+		ExecutionClass:     contracts.ExecutionClassLLMBacked,
+		CorrectionProtocol: contracts.CorrectionProtocolSingleResponseV1,
+		Requires:           []string{"source.transcript"},
+		Provides:           []string{"chunks"},
+		ReferenceSlots:     wantReferenceSlots(),
 	}
 	if got := ModuleSpec(); !reflect.DeepEqual(got, want) {
 		t.Fatalf("ModuleSpec() = %#v, want %#v", got, want)
@@ -181,6 +182,13 @@ func TestPlanReturnsAnnotationFreeSceneRangesFromStructuredOutput(t *testing.T)
 	if len(result.Warnings) != 0 {
 		t.Fatalf("warnings = %#v, want absent", result.Warnings)
 	}
+	wantCandidate, err := json.Marshal(client.response)
+	if err != nil {
+		t.Fatalf("marshal expected candidate: %v", err)
+	}
+	if result.ModelCandidate == nil || result.ModelCandidate.Protocol != contracts.CorrectionProtocolSingleResponseV1 || !reflect.DeepEqual(result.ModelCandidate.Response, wantCandidate) {
+		t.Fatalf("model candidate = %#v, want exact validated response", result.ModelCandidate)
+	}
 }
 
 func TestPlanUsesDocumentOrderForNonconsecutiveUnitIDs(t *testing.T) {