添加apikey国密sm4加解密，agent configs配置功能

src/main/java/com/labelsys/backend/dto/LlmConfigModel.java

@@ -0,0 +1,20 @@
+package com.labelsys.backend.dto;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Data;
+
+@Schema(description = "大模型配置模型")
+@Data
+public class LlmConfigModel {
+    @Schema(description = "多模态类型枚举")
+    private String llmType;
+
+    @Schema(description = "模型名称")
+    private String modelName;
+
+    @Schema(description = "模型调用地址")
+    private String modelUrl;
+
+    @Schema(description = "API密钥，加密存储")
+    private String apiKey;
+}