feat: 完善仓库建筑绑定、质检预警规则与大屏展示

migrations/20261028_quality_direction.sql

@@ -0,0 +1,4 @@
+-- Apply once before deploying the editor/API changes. Adjust fa_ if using a custom prefix.
+-- NULL preserves historical inference until a user explicitly saves a direction.
+ALTER TABLE `fa_testing_params`
+  ADD COLUMN `direction` varchar(5) DEFAULT NULL COMMENT '指标偏好：upper越小越好（高值预警）、lower越大越好（低值预警）';