feat: 修复重试后请求结构混乱，修复rerank端点无法使用

dto/embedding.go

@@ -48,6 +48,12 @@ func (r *EmbeddingRequest) IsStream(c *gin.Context) bool {
 	return false
 }
 
+func (r *EmbeddingRequest) SetModelName(modelName string) {
+	if modelName != "" {
+		r.Model = modelName
+	}
+}
+
 func (r *EmbeddingRequest) ParseInput() []string {
 	if r.Input == nil {
 		return make([]string, 0)