feat: integrate Luoyang pharmacy workflow

server/sql/1.9.20260722/luoyang_pharmacy_erp_status_rollback.sql

@@ -0,0 +1,15 @@
+-- Preserve the ZYT fulfillment status before an EJ pharmacy submission.
+-- EJ review rejection restores this value; it is not customer refusal.
+SET @schema_name := DATABASE();
+
+SET @ddl := IF(
+  EXISTS (
+    SELECT 1 FROM information_schema.COLUMNS
+    WHERE TABLE_SCHEMA = @schema_name
+      AND TABLE_NAME = 'zyt_tcm_prescription_order'
+      AND COLUMN_NAME = 'ej_pharmacy_previous_fulfillment_status'
+  ),
+  'SELECT 1',
+  'ALTER TABLE `zyt_tcm_prescription_order` ADD COLUMN `ej_pharmacy_previous_fulfillment_status` tinyint unsigned NULL DEFAULT NULL COMMENT ''Fulfillment status before EJ pharmacy submission'' AFTER `ej_pharmacy_status_version`'
+);
+PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt;