perf: 收敛后端资源与健康检查开销

- 缩小模块扫描范围并显式注册各业务模块自动配置

- 增加可配置线程池、MQ 连接池与消费线程池，降低默认资源占用

- 将 RAG 与分析库中间件探活下沉到健康检查并增加短缓存

- 补齐文档向量库生命周期释放与 SSE 断连清理

easyflow-modules/easyflow-module-job/src/main/java/tech/easyflow/job/config/JobModuleConfig.java

@@ -1,10 +1,12 @@
 package tech.easyflow.job.config;
 
 import org.mybatis.spring.annotation.MapperScan;
-import org.springframework.context.annotation.Configuration;
+import org.springframework.boot.autoconfigure.AutoConfiguration;
+import org.springframework.context.annotation.ComponentScan;
 
-@Configuration
+@AutoConfiguration
 @MapperScan("tech.easyflow.job.mapper")
+@ComponentScan("tech.easyflow.job")
 public class JobModuleConfig {
 
     public JobModuleConfig() {