feat: 添加异步配置类,配置导入任务专用线程池

- 创建AsyncConfig配置类,启用Spring异步支持
- 配置importExecutor线程池:
  * 核心线程数: 2
  * 最大线程数: 5
  * 队列容量: 100
  * 线程名前缀: import-async-
  * 拒绝策略: CallerRunsPolicy
  * 优雅关闭: 等待60秒完成任务

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

ruoyi-ccdi/src/main/java/com/ruoyi/ccdi/config/AsyncConfig.java

@@ -0,0 +1,43 @@
+package com.ruoyi.ccdi.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.ThreadPoolExecutor;
+
+/**
+ * 异步配置类
+ *
+ * @author ruoyi
+ */
+@Configuration
+@EnableAsync
+public class AsyncConfig {
+
+    /**
+     * 导入任务专用线程池
+     */
+    @Bean("importExecutor")
+    public Executor importExecutor() {
+        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+        // 核心线程数
+        executor.setCorePoolSize(2);
+        // 最大线程数
+        executor.setMaxPoolSize(5);
+        // 队列容量
+        executor.setQueueCapacity(100);
+        // 线程名前缀
+        executor.setThreadNamePrefix("import-async-");
+        // 拒绝策略:由调用线程执行
+        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
+        // 等待所有任务完成后再关闭线程池
+        executor.setWaitForTasksToCompleteOnShutdown(true);
+        // 等待时间
+        executor.setAwaitTerminationSeconds(60);
+        executor.initialize();
+        return executor;
+    }
+}