Add feedback-aware correction contracts

internal/modules/dnd/normalize/npcregistry/normalizer_test.go

@@ -3,6 +3,7 @@ package npcregistry
 import (
 	"context"
 	"encoding/json"
+	"fmt"
 	"reflect"
 	"strings"
 	"testing"
@@ -148,7 +149,11 @@ type recordingNPCNormalizerClient struct {
 }
 
 func (c *recordingNPCNormalizerClient) CompleteStructured(_ context.Context, request contracts.StructuredCompletionRequest, output any) (contracts.StructuredCompletionResponse, error) {
-	c.requests = append(c.requests, request)
+	snapshot, err := contracts.CloneStructuredCompletionRequest(request)
+	if err != nil {
+		return contracts.StructuredCompletionResponse{}, fmt.Errorf("clone recording request: %w", err)
+	}
+	c.requests = append(c.requests, snapshot)
 	if c.err != nil {
 		return contracts.StructuredCompletionResponse{}, c.err
 	}