refactor(core): 调整拦截器参数注解并移除冗余导入

- 修改 TraceInterceptor 中 afterCompletion 方法的参数注解为 Spring Nullable
- 移除 UserBindingPageResult 类中的 Page 导入语句
- 提升代码可读性和维护性

src/main/java/work/baiyun/chronicdiseaseapp/config/TraceInterceptor.java

@@ -41,7 +41,7 @@ public class TraceInterceptor implements HandlerInterceptor {
     }
 
     @Override
-    public void afterCompletion(@NonNull HttpServletRequest request, @NonNull HttpServletResponse response, @NonNull Object handler, Exception ex) throws Exception {
+    public void afterCompletion(@org.springframework.lang.Nullable HttpServletRequest request, @org.springframework.lang.Nullable HttpServletResponse response, @org.springframework.lang.Nullable Object handler, @org.springframework.lang.Nullable Exception ex) throws Exception {
         MDC.remove("requestId");
         MDC.remove("traceId");
     }

src/main/java/work/baiyun/chronicdiseaseapp/model/vo/UserBindingPageResult.java

@@ -1,6 +1,5 @@
 package work.baiyun.chronicdiseaseapp.model.vo;
 
-import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Data;