fix(build): 私服 legacy 坐标分离、电梯 common/data 可编译与本地编译文档

- cloudwalk.legacy.public.version=3.7.2：result/web/serial 仍走私服；event/service 用 4.0.0
- common: spring-web；CollectionUtils for-each  Iterable 强转
- data: 反编译 DTO hashCode/import 修正（ImageRuleRef*、AcsElevatorDevice*）
- docs/build/本地编译说明.md；Maven工作区修订表补充 legacy 说明

Made-with: Cursor

maven-ninca-qk-alarm/pom.xml

@@ -24,6 +24,7 @@
     <properties>
         <java.version>1.8</java.version>
         <cloudwalk.internal.version>4.0.0-Brussels-SRX</cloudwalk.internal.version>
+        <cloudwalk.legacy.public.version>3.7.2-Brussels-SRX</cloudwalk.legacy.public.version>
         <curator.version>4.2.0</curator.version>
         <zookeeper.version>3.4.14</zookeeper.version>
         <mybatis-spring-boot.version>2.0.1</mybatis-spring-boot.version>
@@ -74,7 +75,7 @@
             <dependency>
                 <groupId>cn.cloudwalk.cloud</groupId>
                 <artifactId>cloudwalk-common-web</artifactId>
-                <version>${cloudwalk.internal.version}</version>
+                <version>${cloudwalk.legacy.public.version}</version>
             </dependency>
         </dependencies>
     </dependencyManagement>