add a validation check on down

apps/application-system/api/migrations/20241022145836-payment-alter-column-definition-text.js

@@ -4,14 +4,24 @@ module.exports = {
   up: async (queryInterface, Sequelize) => {
     await queryInterface.changeColumn('payment', 'definition', {
       type: Sequelize.TEXT,
-      allowNull: true, // Keep the same nullability as before
+      allowNull: true,
     })
   },
 
   down: async (queryInterface, Sequelize) => {
+    // Check for records that might be truncated
+    const records = await queryInterface.sequelize.query(
+      `SELECT id FROM payment WHERE LENGTH(CAST(definition AS TEXT)) > 255`,
+    )
+    if (records[0].length > 0) {
+      throw new Error(
+        'Cannot safely rollback: Some records exceed STRING length limit',
+      )
+    }
+
     await queryInterface.changeColumn('payment', 'definition', {
       type: Sequelize.STRING,
-      allowNull: true, // Revert to the original type and nullability
+      allowNull: true,
     })
   },
 }