- CustomerArchiveService: 用户档案CRUD/分页查询/销户/统计(JdbcTemplate风格) - BillingConfigService: 阶梯水价查询更新/收费配置/污水处理费率/全量配置 - CustomerArchiveController: 6个端点 (/revenue/customer/*) - BillingConfigController: 6个端点 (/revenue/config/*) - DDL: rev_billing_config/rev_customer/rev_water_price + 默认数据