perf: 并行构建 + Maven 依赖缓存优化

主要改进：
1. 并行构建（最大 2 个服务同时构建）
2. Maven 依赖基础镜像（aiot-deps）
3. 服务构建基于依赖镜像，跳过依赖下载
4. 部署也支持并行

预期效果：后续构建时间从 25分钟 降至 8-12分钟

docker/Dockerfile.deps

@@ -0,0 +1,38 @@
+# ============================================
+# Maven 依赖基础镜像
+# 预下载所有依赖，供服务构建时复用
+# ============================================
+
+FROM eclipse-temurin:17-jdk-alpine
+
+# 安装 Maven
+RUN apk add --no-cache maven
+
+WORKDIR /build
+
+# 复制所有 pom 文件
+COPY pom.xml .
+COPY viewsh-dependencies/pom.xml viewsh-dependencies/
+COPY viewsh-framework/pom.xml viewsh-framework/
+COPY viewsh-gateway/pom.xml viewsh-gateway/
+COPY viewsh-server/pom.xml viewsh-server/
+COPY viewsh-module-system/pom.xml viewsh-module-system/
+COPY viewsh-module-system/viewsh-module-system-api/pom.xml viewsh-module-system/viewsh-module-system-api/
+COPY viewsh-module-system/viewsh-module-system-server/pom.xml viewsh-module-system/viewsh-module-system-server/
+COPY viewsh-module-infra/pom.xml viewsh-module-infra/
+COPY viewsh-module-infra/viewsh-module-infra-api/pom.xml viewsh-module-infra/viewsh-module-infra-api/
+COPY viewsh-module-infra/viewsh-module-infra-server/pom.xml viewsh-module-infra/viewsh-module-infra-server/
+COPY viewsh-module-iot/pom.xml viewsh-module-iot/
+COPY viewsh-module-iot/viewsh-module-iot-core/pom.xml viewsh-module-iot/viewsh-module-iot-core/
+COPY viewsh-module-iot/viewsh-module-iot-api/pom.xml viewsh-module-iot/viewsh-module-iot-api/
+COPY viewsh-module-iot/viewsh-module-iot-server/pom.xml viewsh-module-iot/viewsh-module-iot-server/
+COPY viewsh-module-iot/viewsh-module-iot-gateway/pom.xml viewsh-module-iot/viewsh-module-iot-gateway/
+
+# 下载所有依赖到本地仓库
+RUN mvn dependency:go-offline -B || true
+
+# 复制源代码
+COPY . .
+
+# 预编译 framework 和 dependencies（所有服务共享）
+RUN mvn install -pl viewsh-dependencies,viewsh-framework -am -DskipTests -B -q || true