feat: 实现RCU升级后端服务初始版本

- 添加Kafka消费者组件用于消费升级事件数据
- 实现数据处理器进行数据验证和转换
- 添加数据库写入组件支持批量写入G5数据库
- 配置环境变量管理连接参数
- 添加日志记录和错误处理机制
- 实现优雅关闭和流控功能

bls-upgrade-backend/.env

@@ -0,0 +1,55 @@
+KAFKA_BROKERS=kafka.blv-oa.com:9092
+KAFKA_CLIENT_ID=bls-upgrade-producer
+KAFKA_GROUP_ID=bls-upgrade-consumer
+KAFKA_TOPICS=blwlog4Nodejs-rcu-upgrade-topic
+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=1
+KAFKA_MAX_IN_FLIGHT=5000
+KAFKA_BATCH_SIZE=1000
+KAFKA_BATCH_TIMEOUT_MS=20
+KAFKA_COMMIT_INTERVAL_MS=200
+KAFKA_COMMIT_ON_ATTEMPT=true
+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
+
+# =========================
+# PostgreSQL 配置 G5库专用
+# =========================
+POSTGRES_HOST_G5=10.8.8.80
+POSTGRES_PORT_G5=5434
+POSTGRES_DATABASE_G5=log_platform
+POSTGRES_USER_G5=log_admin
+POSTGRES_PASSWORD_G5=H3IkLUt8K!x
+POSTGRES_IDLE_TIMEOUT_MS_G5=30000
+POSTGRES_MAX_CONNECTIONS_G5=2
+DB_SCHEMA_G5=rcu_upgrade
+DB_TABLE_G5=rcu_upgrade_events_g5
+
+
+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