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-commons/easyflow-common-analytical-db/pom.xml

@@ -25,6 +25,11 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-autoconfigure</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-actuator</artifactId>
+            <version>${spring-boot.version}</version>
+        </dependency>
         <dependency>
             <groupId>com.clickhouse</groupId>
             <artifactId>clickhouse-jdbc</artifactId>

easyflow-commons/easyflow-common-analytical-db/src/main/java/tech/easyflow/common/analyticaldb/support/AnalyticalDBHealthIndicator.java

@@ -0,0 +1,41 @@
+package tech.easyflow.common.analyticaldb.support;
+
+import org.springframework.boot.actuate.health.Health;
+import org.springframework.boot.actuate.health.HealthIndicator;
+import org.springframework.stereotype.Component;
+
+/**
+ * 分析数据库健康检查。
+ */
+@Component("analyticalDbHealthIndicator")
+public class AnalyticalDBHealthIndicator implements HealthIndicator {
+
+    private final AnalyticalDBHealthSupport healthSupport;
+
+    /**
+     * 创建分析数据库健康检查器。
+     *
+     * @param healthSupport 分析数据库健康检查支持
+     */
+    public AnalyticalDBHealthIndicator(AnalyticalDBHealthSupport healthSupport) {
+        this.healthSupport = healthSupport;
+    }
+
+    /**
+     * 检查分析数据库是否可用。
+     *
+     * @return 健康状态
+     */
+    @Override
+    public Health health() {
+        if (!healthSupport.enabled()) {
+            return Health.up().withDetail("enabled", false).build();
+        }
+        try {
+            healthSupport.selfCheck();
+            return Health.up().withDetail("enabled", true).build();
+        } catch (Exception e) {
+            return Health.down(e).withDetail("enabled", true).build();
+        }
+    }
+}