fix(core): 跨 crate 小修复 — dto 合并、tracing 补全、死代码清理

- erp-ai: 删除孤立 dto.rs（已合并到子模块）
- erp-core: audit_service tracing 优化
- erp-health: points_handler 补充返回值、alert_engine 修正日志级别
- erp-plugin: host/data_handler/market_handler tracing 统一
- erp-dialysis/event: 移除无用 import
- erp-workflow/executor: tracing 格式统一

crates/erp-ai/src/service/auto_analysis.rs

@@ -6,7 +6,7 @@
 use std::time::Duration;
 
 use erp_core::health_provider::{HealthDataProvider, TimeRange};
-use sea_orm::{ColumnTrait, EntityTrait, FromQueryResult, QueryFilter, Statement};
+use sea_orm::{EntityTrait, FromQueryResult, Statement};
 use uuid::Uuid;
 
 use crate::dto::AnalysisType;