fix(iot): B7 BranchNode @Lazy 注入 NodeProviderRegistry 打破循环依赖

启动失败：Spring 检测到环形依赖
  nodeProviderRegistry → branchNode → nodeProviderRegistry

根因：BranchNode 既是 NodeProvider（被 Registry 收集），又依赖 Registry
dispatch 子节点 — 典型 "collect vs dispatch" 死结。

修复：构造参数加 @Lazy，Spring 注入代理，首次方法调用才解析 Registry，
构造阶段打破环。运行期行为等价。

rule 模块 177/177 测试全绿。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

viewsh-module-iot/viewsh-module-iot-rule/src/main/java/com/viewsh/module/iot/rule/engine/branch/BranchNode.java

@@ -10,6 +10,7 @@ import com.viewsh.module.iot.rule.engine.NodeProviderRegistry;
 import com.viewsh.module.iot.rule.engine.NodeResult;
 import com.viewsh.module.iot.rule.engine.RuleContext;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Component;
 
 import java.util.List;
@@ -52,7 +53,7 @@ public class BranchNode implements NodeProvider {
     private final BranchExecutor branchExecutor;
 
     public BranchNode(ConditionEvaluatorManager conditionEvaluatorManager,
-                      NodeProviderRegistry nodeProviderRegistry) {
+                      @Lazy NodeProviderRegistry nodeProviderRegistry) {
         this.conditionEvaluatorManager = conditionEvaluatorManager;
         this.nodeProviderRegistry = nodeProviderRegistry;
         this.branchExecutor = new BranchExecutor(conditionEvaluatorManager);