fix: keep ambiguous legacy phones unbound

deploy/sql/头程数据库统一增量-MySQL8.sql

@@ -17077,6 +17077,52 @@ CREATE TABLE IF NOT EXISTS fl_dropship_pallet_carton (
   CONSTRAINT fk_dropship_carton_label FOREIGN KEY (carton_label_id) REFERENCES fl_inbound_carton_label(id)
 ) ENGINE=InnoDB COMMENT='一件代发托盘内逐箱SKU和入仓单明细';
 
+-- Auth 登录手机号只从 IAM 中唯一归属的中国大陆手机号回填；存量重复号保持 NULL。
+USE baiyue_auth;
+DROP PROCEDURE IF EXISTS auth_add_login_phone;
+DELIMITER $$
+CREATE PROCEDURE auth_add_login_phone()
+BEGIN
+  IF NOT EXISTS (
+      SELECT 1 FROM information_schema.columns
+       WHERE table_schema = 'baiyue_auth' AND table_name = 'auth_account' AND column_name = 'phone') THEN
+    ALTER TABLE auth_account ADD COLUMN phone VARCHAR(32) NULL COMMENT '全局唯一中国大陆登录手机号' AFTER username;
+  END IF;
+END$$
+DELIMITER ;
+CALL auth_add_login_phone();
+DROP PROCEDURE auth_add_login_phone;
+
+DROP PROCEDURE IF EXISTS auth_backfill_login_phone;
+DELIMITER $$
+CREATE PROCEDURE auth_backfill_login_phone()
+BEGIN
+  UPDATE auth_account
+     SET phone = NULL
+   WHERE phone IS NOT NULL AND phone NOT REGEXP '^1[3-9][0-9]{9}$';
+  UPDATE auth_account account
+  JOIN baiyue_iam.iam_user user ON user.auth_user_id = account.id AND user.deleted = 0
+  JOIN (
+    SELECT phone
+      FROM baiyue_iam.iam_user
+     WHERE deleted = 0 AND phone REGEXP '^1[3-9][0-9]{9}$'
+     GROUP BY phone
+    HAVING COUNT(DISTINCT auth_user_id) = 1
+  ) unique_phone ON unique_phone.phone = user.phone
+     SET account.phone = user.phone
+   WHERE account.phone IS NULL AND user.phone REGEXP '^1[3-9][0-9]{9}$';
+  IF NOT EXISTS (
+      SELECT 1 FROM information_schema.statistics
+       WHERE table_schema = 'baiyue_auth' AND table_name = 'auth_account'
+         AND index_name = 'uk_auth_account_phone') THEN
+    ALTER TABLE auth_account ADD UNIQUE KEY uk_auth_account_phone (phone);
+  END IF;
+END$$
+DELIMITER ;
+CALL auth_backfill_login_phone();
+DROP PROCEDURE auth_backfill_login_phone;
+
+USE baiyue_firstleg;
 CALL baiyue_firstleg.assert_unified_final_schema();
 DROP PROCEDURE IF EXISTS baiyue_firstleg.assert_unified_final_schema;
 SELECT 'PASS' AS migration_status,