feat: App 后台 Phase 1 Maven 治理 + Docker 部署

- 创建 xiaoqu-app-parent 统一父 POM，管理 4 个 App 模块依赖版本
- 统一 fastjson(1.2.83)、druid(1.2.27)、jedis(3.1.0) 等版本
- 子模块 POM 改造：继承父 POM，删除硬编码版本号
- 添加 Docker 部署方案（complex + mall 双容器）
- 添加 ARCHITECTURE.md 架构文档（三套 DAO 层、冻结规范、新项目规范）
- 关联需求：REQ-20260421-0011

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

deploy/docker-app/docker-compose.yml

@@ -0,0 +1,52 @@
+services:
+  complex:
+    image: smartclean-complex:${VERSION:-latest}
+    container_name: smartclean-complex
+    build:
+      context: ../..
+      dockerfile: deploy/docker-app/Dockerfile.complex
+    ports:
+      - "${COMPLEX_PORT:-18091}:8080"
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    volumes:
+      - complex_logs:/app/logs
+    healthcheck:
+      test: ["CMD", "curl", "-sf", "http://localhost:8080/"]
+      interval: 15s
+      timeout: 5s
+      retries: 5
+      start_period: 90s
+    restart: on-failure:3
+    networks:
+      - smartclean-app
+
+  mall:
+    image: smartclean-mall:${VERSION:-latest}
+    container_name: smartclean-mall
+    build:
+      context: ../..
+      dockerfile: deploy/docker-app/Dockerfile.mall
+    ports:
+      - "${MALL_PORT:-18086}:8080"
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    volumes:
+      - mall_logs:/app/logs
+    healthcheck:
+      test: ["CMD", "curl", "-sf", "http://localhost:8080/"]
+      interval: 15s
+      timeout: 5s
+      retries: 5
+      start_period: 90s
+    restart: on-failure:3
+    networks:
+      - smartclean-app
+
+volumes:
+  complex_logs:
+  mall_logs:
+
+networks:
+  smartclean-app:
+    driver: bridge