refactor: replace sjson.Set usage with sjson.SetBytes to optimize mutable JSON transformations

sdk/translator/pipeline.go

@@ -16,7 +16,7 @@ type ResponseEnvelope struct {
 	Model  string
 	Stream bool
 	Body   []byte
-	Chunks []string
+	Chunks [][]byte
 }
 
 // RequestMiddleware decorates request translation.
@@ -87,7 +87,7 @@ func (p *Pipeline) TranslateResponse(ctx context.Context, from, to Format, resp
 		if input.Stream {
 			input.Chunks = p.registry.TranslateStream(ctx, from, to, input.Model, originalReq, translatedReq, input.Body, param)
 		} else {
-			input.Body = []byte(p.registry.TranslateNonStream(ctx, from, to, input.Model, originalReq, translatedReq, input.Body, param))
+			input.Body = p.registry.TranslateNonStream(ctx, from, to, input.Model, originalReq, translatedReq, input.Body, param)
 		}
 		input.Format = to
 		return input, nil