fix(pms-base): ce-code-review 修复 V13 数据精度 + roomIds 长度校验

P1 数据精度 bug：V13 迁移原顺序为 ALTER(DECIMAL→BIGINT) 先于
UPDATE(×100)，MySQL 在 ALTER 时对 DECIMAL→BIGINT 四舍五入会丢失
分位，再 ×100 放大误差（如 1000.50 → 1001 → 100100，应为 100050）。
修复：调整为 UPDATE 先（×100 时仍为 DECIMAL 无精度损失），ALTER 后
（值为整数，BIGINT 转换无舍入）。

P2 安全发现：EnterpriseSaveRequest.roomIds 缺少 @Size 约束，补充
max=500 限制避免超长字符串攻击。

Tests: BUILD SUCCESSFUL, 357 tests, 0 failures.

backend/pms-base/src/main/java/com/pms/base/dto/EnterpriseSaveRequest.java

@@ -40,6 +40,7 @@ public class EnterpriseSaveRequest implements Serializable {
     @Size(max = 255, message = "经营范围长度不能超过255")
     private String businessScope;
 
+    @Size(max = 500, message = "承租房间ID列表长度不能超过500")
     private String roomIds;
     private Integer status;
 

backend/pms-base/src/main/resources/db/migration/V13__migrate_amount_to_long_fen.sql

@@ -1,38 +1,39 @@
 -- V13: BigDecimal 金额字段迁移到 Long（分）
 -- 仅迁移金额字段，非金额 BigDecimal（面积/比例/经纬度/仪表读数）保持不变
 -- 值转换：DECIMAL(15,2) 元 → BIGINT 分（× 100，四舍五入）
+-- 注意：UPDATE 必须在 ALTER 之前执行，否则 DECIMAL→BIGINT 转换会先四舍五入丢失分位
 
 -- t_contract: amount, deposit
+UPDATE t_contract SET amount = ROUND(amount * 100, 0), deposit = ROUND(deposit * 100, 0);
 ALTER TABLE t_contract MODIFY COLUMN amount BIGINT NOT NULL DEFAULT 0 COMMENT '合同金额（分）';
 ALTER TABLE t_contract MODIFY COLUMN deposit BIGINT NOT NULL DEFAULT 0 COMMENT '押金（分）';
-UPDATE t_contract SET amount = ROUND(amount * 100, 0), deposit = ROUND(deposit * 100, 0);
 
 -- t_lease_contract: rent_amount, deposit
+UPDATE t_lease_contract SET rent_amount = ROUND(rent_amount * 100, 0), deposit = ROUND(deposit * 100, 0);
 ALTER TABLE t_lease_contract MODIFY COLUMN rent_amount BIGINT NOT NULL DEFAULT 0 COMMENT '月租金（分）';
 ALTER TABLE t_lease_contract MODIFY COLUMN deposit BIGINT NOT NULL DEFAULT 0 COMMENT '押金（分）';
-UPDATE t_lease_contract SET rent_amount = ROUND(rent_amount * 100, 0), deposit = ROUND(deposit * 100, 0);
 
 -- t_workshop_lease: rent_amount
-ALTER TABLE t_workshop_lease MODIFY COLUMN rent_amount BIGINT NOT NULL DEFAULT 0 COMMENT '租金金额（分）';
 UPDATE t_workshop_lease SET rent_amount = ROUND(rent_amount * 100, 0);
+ALTER TABLE t_workshop_lease MODIFY COLUMN rent_amount BIGINT NOT NULL DEFAULT 0 COMMENT '租金金额（分）';
 
 -- t_public_revenue: amount
-ALTER TABLE t_public_revenue MODIFY COLUMN amount BIGINT NOT NULL DEFAULT 0 COMMENT '收益金额（分）';
 UPDATE t_public_revenue SET amount = ROUND(amount * 100, 0);
+ALTER TABLE t_public_revenue MODIFY COLUMN amount BIGINT NOT NULL DEFAULT 0 COMMENT '收益金额（分）';
 
 -- t_cam_charge: total_amount, allocated_amount
+UPDATE t_cam_charge SET total_amount = ROUND(total_amount * 100, 0), allocated_amount = ROUND(allocated_amount * 100, 0);
 ALTER TABLE t_cam_charge MODIFY COLUMN total_amount BIGINT NOT NULL DEFAULT 0 COMMENT '本期公共费用总额（分）';
 ALTER TABLE t_cam_charge MODIFY COLUMN allocated_amount BIGINT NOT NULL DEFAULT 0 COMMENT '分摊金额（分）';
-UPDATE t_cam_charge SET total_amount = ROUND(total_amount * 100, 0), allocated_amount = ROUND(allocated_amount * 100, 0);
 
 -- t_device: price
-ALTER TABLE t_device MODIFY COLUMN price BIGINT NOT NULL DEFAULT 0 COMMENT '采购价格（分）';
 UPDATE t_device SET price = ROUND(price * 100, 0);
+ALTER TABLE t_device MODIFY COLUMN price BIGINT NOT NULL DEFAULT 0 COMMENT '采购价格（分）';
 
 -- t_device_maintenance: cost
-ALTER TABLE t_device_maintenance MODIFY COLUMN cost BIGINT NOT NULL DEFAULT 0 COMMENT '维保费用（分）';
 UPDATE t_device_maintenance SET cost = ROUND(cost * 100, 0);
+ALTER TABLE t_device_maintenance MODIFY COLUMN cost BIGINT NOT NULL DEFAULT 0 COMMENT '维保费用（分）';
 
 -- t_renovation: deposit_amount
-ALTER TABLE t_renovation MODIFY COLUMN deposit_amount BIGINT NOT NULL DEFAULT 0 COMMENT '装修押金（分）';
 UPDATE t_renovation SET deposit_amount = ROUND(deposit_amount * 100, 0);
+ALTER TABLE t_renovation MODIFY COLUMN deposit_amount BIGINT NOT NULL DEFAULT 0 COMMENT '装修押金（分）';