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-autoconfig/src/main/java/tech/easyflow/autoconfig/config/AutoConfig.java

@@ -4,7 +4,14 @@ import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 
 @Configuration(proxyBeanMethods = false)
-@ComponentScan({"tech.easyflow"})
+@ComponentScan({
+        "tech.easyflow.admin",
+        "tech.easyflow.usercenter",
+        "tech.easyflow.publicapi",
+        "tech.easyflow.common",
+        "tech.easyflow.core",
+        "tech.easyflow.autoconfig"
+})
 @org.springframework.boot.autoconfigure.AutoConfiguration
 public class AutoConfig {
     public AutoConfig() {