refactor(util): 重构BeanContext接口及相关实现

将ContextUtils重命名为BeanContext，并统一客户端和服务端的实现
添加DefaultBeanContext作为默认实现
优化Inventory同步任务逻辑，支持WebSocket远程调用
更新tasker_mapper.json添加新的任务映射
移除未使用的syncInventory方法

server/src/main/java/com/ecep/contract/util/DefaultBeanContext.java

@@ -0,0 +1,29 @@
+package com.ecep.contract.util;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.springframework.beans.BeansException;
+
+import com.ecep.contract.SpringApp;
+
+/**
+ * 默认的Bean上下文实现类
+ */
+public class DefaultBeanContext implements BeanContext {
+    private Map<Class<?>, Object> cachedBeans = new HashMap<>();
+
+    public <T> T getBean(Class<T> requiredType) throws BeansException {
+        return getCachedBean(requiredType);
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T> T getCachedBean(Class<T> requiredType) throws BeansException {
+        Object object = cachedBeans.get(requiredType);
+        if (object == null) {
+            object = SpringApp.getBean(requiredType);
+            cachedBeans.put(requiredType, object);
+        }
+        return (T) object;
+    }
+}