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-plugin/src/handler/data_handler.rs

@@ -1061,7 +1061,7 @@ where
 pub async fn delete_user_view<S>(
     State(state): State<PluginState>,
     Extension(ctx): Extension<TenantContext>,
-    Path((plugin_id, entity, view_id)): Path<(Uuid, String, Uuid)>,
+    Path((_plugin_id, _entity, view_id)): Path<(Uuid, String, Uuid)>,
 ) -> Result<Json<ApiResponse<()>>, AppError>
 where
     PluginState: FromRef<S>,

crates/erp-plugin/src/handler/market_handler.rs

@@ -210,7 +210,7 @@ where
     ).await?;
 
     let plugin_id = plugin_resp.id;
-    let plugin_resp = crate::service::PluginService::install(
+    let _plugin_resp = crate::service::PluginService::install(
         plugin_id,
         ctx.tenant_id,
         ctx.user_id,

crates/erp-plugin/src/host.rs

@@ -150,7 +150,7 @@ impl host_api::Host for HostState {
                 .ok_or_else(|| format!("实体 '{}' 的查询结果未预填充", entity));
         }
 
-        let db = self.db.clone().unwrap();
+        let db = self.db.clone().ok_or("数据库连接不可用")?;
         let event_bus = self.event_bus.clone()
             .ok_or("事件总线不可用")?;
 
@@ -314,7 +314,7 @@ impl host_api::Host for HostState {
         let db = self.db.clone()
             .ok_or("编号生成需要数据库连接")?;
 
-        let tenant_id = self.tenant_id;
+        let _tenant_id = self.tenant_id;
         let plugin_id = self.plugin_id.clone();
 
         let rt = tokio::runtime::Handle::current();