[Etapa 2 · Card 04] Migration: preservar visualizar_provas antes de dropar criar_simulado

src/db/migrations/1783296001000-preserve_visualizar_provas_from_criar_simulado.ts

@@ -0,0 +1,20 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class PreserveVisualizarProvasFromCriarSimulado1783296001000
+  implements MigrationInterface
+{
+  name = 'PreserveVisualizarProvasFromCriarSimulado1783296001000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `UPDATE \`roles\`
+       SET \`visualizar_provas\` = 1
+       WHERE \`criar_simulado\` = 1
+         AND \`visualizar_provas\` = 0`,
+    );
+  }
+
+  public async down(_queryRunner: QueryRunner): Promise<void> {
+    // intentionally empty — rollback not safe nor required
+  }
+}