feat: 初始化 bls-onoffline-backend 项目基础结构

添加 Kafka 消费者、数据库写入、Redis 集成等核心模块，实现设备上下线事件处理
- 创建项目基础目录结构与配置文件
- 实现 Kafka 消费逻辑与手动提交偏移量
- 添加 PostgreSQL 数据库连接与分区表管理
- 集成 Redis 用于错误队列和项目心跳
- 包含数据处理逻辑，区分重启与非重启数据
- 提供数据库初始化脚本与分区创建工具
- 添加单元测试与代码校验脚本

bls-onoffline-backend/.env

@@ -0,0 +1,37 @@
+KAFKA_BROKERS=kafka.blv-oa.com:9092
+KAFKA_CLIENT_ID=bls-onoffline-producer
+KAFKA_GROUP_ID=bls-onoffline-consumer
+KAFKA_TOPICS=blwlog4Nodejs-rcu-onoffline-topic-0
+KAFKA_AUTO_COMMIT=false
+KAFKA_AUTO_COMMIT_INTERVAL_MS=5000
+KAFKA_SASL_ENABLED=true
+KAFKA_SASL_MECHANISM=plain
+KAFKA_SASL_USERNAME=blwmomo
+KAFKA_SASL_PASSWORD=blwmomo
+KAFKA_SSL_ENABLED=false
+KAFKA_CONSUMER_INSTANCES=6
+KAFKA_MAX_IN_FLIGHT=50
+KAFKA_FETCH_MAX_BYTES=10485760
+KAFKA_FETCH_MAX_WAIT_MS=100
+KAFKA_FETCH_MIN_BYTES=1
+
+POSTGRES_HOST=10.8.8.109
+POSTGRES_PORT=5433
+POSTGRES_DATABASE=log_platform
+POSTGRES_USER=log_admin
+POSTGRES_PASSWORD=YourActualStrongPasswordForPostgres!
+POSTGRES_MAX_CONNECTIONS=6
+POSTGRES_IDLE_TIMEOUT_MS=30000
+DB_SCHEMA=onoffline
+DB_TABLE=onoffline_record
+
+PORT=3001
+LOG_LEVEL=info
+
+# Redis connection
+REDIS_HOST=10.8.8.109
+REDIS_PORT=6379
+REDIS_PASSWORD=
+REDIS_DB=15
+REDIS_CONNECT_TIMEOUT_MS=5000
+REDIS_PROJECT_NAME=bls-onoffline