Initial commit: reorganized source tree

- backend/: 13 Maven modules (cw-elevator-application, cloudwalk-cloud, intelligent-cwoscomponent, ninca-crk, etc.)
- frontend/: 4 Vue projects (elevator-front, cwos-portal, alarm-front, front_acs) + decompiled + scripts
- scripts/: build, test-env, tools (Docker Compose, service templates, API parity)
- docs/: AGENTS.md, superpowers specs, architecture docs
- .gitignore: standard Java/Maven exclusions

Moved from legacy maven-*/ root layout to backend/ organized structure.

backend/cwos-resource/cwos-device-pkg-stub/pom.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>cn.cloudwalk.cloud</groupId>
+        <artifactId>cwos-resource-reactor</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <groupId>cn.cloudwalk</groupId>
+    <artifactId>cwos-device-pkg-stub</artifactId>
+    <packaging>jar</packaging>
+    <name>cwos-device-pkg-stub</name>
+    <description>占位：反编译 cwos-portal-interface 依赖的 cn.cloudwalk.client.device.pkg.result.DeviceUpgradeResult，运行包中来自其它 CWOS 构件。</description>
+</project>

backend/cwos-resource/cwos-device-pkg-stub/src/main/java/cn/cloudwalk/client/device/pkg/result/DeviceUpgradeResult.java

@@ -0,0 +1,11 @@
+package cn.cloudwalk.client.device.pkg.result;
+
+import java.io.Serializable;
+
+/**
+ * 编译占位基类（见模块 pom 说明）。原逻辑来自设备侧 CWOS 包。
+ */
+public class DeviceUpgradeResult implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+}