- entity: DeviceShadow, OtaFirmware, OtaTask, OtaUpgradeRecord
- service: DeviceShadowService (Redis Hash + TTL 24h, 上报/期望/delta/离线检测/批量查询)
- service: OtaService (固件管理/升级任务创建按批次/进度追踪/结果统计)
- controller: DeviceShadowController /api/iot/shadow/*
- controller: OtaController /api/iot/ota/*
- config: RedisConfig (RedisTemplate JSON序列化)
- SQL DDL: iot_ota_firmware, iot_ota_task, iot_ota_upgrade_record
- test: DeviceShadowServiceTest + OtaServiceTest (mock Redis + mock DB)

- Maven 父工程 wm-parent (Spring Boot 3.3.5 + Cloud 2023.0.3 + Alibaba 2023.0.1)
- 12个子模块: wm-common/gateway/base/iot/data-engine/bpm/production/revenue/patrol/bi/notify/job
- wm-common: 统一响应 R<T> + 全局异常处理 + BusinessException
- wm-gateway: Spring Cloud Gateway 路由配置（7个微服务路由）
- 集成: Nacos(注册/配置) + PostgreSQL + Redis + Kafka + Sa-Token + MyBatis-Plus + Knife4j
- docker-compose.yml: 一键启动10个中间件(PG+PostGIS/TDengine/Redis/Kafka/EMQX/Nacos/ES/Kibana/MinIO/GeoServer)