统一将 bms_region 替换为 region，更新相关注释和文档以反映这一变化。

bms-back/sql/price/region_rename.sql

@@ -0,0 +1,16 @@
+-- Rename region tables (drop bms_ prefix)
+SET NAMES utf8mb4;
+
+SET @t := (
+  SELECT TABLE_NAME FROM information_schema.TABLES
+  WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'bms_region' LIMIT 1
+);
+SET @sql := IF(@t IS NULL, 'SELECT 1', 'RENAME TABLE bms_region TO region');
+PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;
+
+SET @t := (
+  SELECT TABLE_NAME FROM information_schema.TABLES
+  WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'bms_region_sync_log' LIMIT 1
+);
+SET @sql := IF(@t IS NULL, 'SELECT 1', 'RENAME TABLE bms_region_sync_log TO region_sync_log');
+PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;