feat: support overseas warehouse locations and A0 overflow

deploy/sql/migrations/overseas/baiyue_lastlag_warehouse/V1__add_shared_overflow_location.sql

@@ -0,0 +1,5 @@
+-- 海外仓库位 A0 共享溢出位：普通库位独占，A0 允许多托盘共享。
+ALTER TABLE wh_location
+  ADD COLUMN shared_overflow TINYINT(1) NOT NULL DEFAULT 0
+  COMMENT '是否系统共享溢出库位（A0）'
+  AFTER location_type;