fix(f4): make inspection legacy field removal data reversible

api-v3/src/database/migrations/1790000500000-f4-remove-inspection-legacy-fields.ts

@@ -5,13 +5,44 @@ import { MigrationInterface, QueryRunner } from 'typeorm';
  * - title: la Inspección se identifica por su código autogenerado.
  * - planned_end_at: la planificación sólo define la fecha/hora prevista de inicio.
  *
+ * La migración conserva una copia técnica de los valores eliminados para que un
+ * rollback restaure los datos exactos existentes antes del cambio. Inspecciones
+ * creadas después del up() reciben code como title y planned_end_at NULL al bajar.
+ *
  * Se conserva un índice sobre planned_start_at porque sigue siendo un criterio de
- * orden y filtro operativo. El rollback reconstruye la forma original de D1.
+ * orden y filtro operativo. Ninguna migración histórica se modifica.
  */
 export class F4RemoveInspectionLegacyFields1790000500000 implements MigrationInterface {
   name = 'F4RemoveInspectionLegacyFields1790000500000';
 
   public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      CREATE TABLE IF NOT EXISTS f4_inspection_visit_legacy_fields_backup (
+        visit_id uuid PRIMARY KEY,
+        title varchar(200) NOT NULL,
+        planned_end_at timestamptz NULL,
+        backed_up_at timestamptz NOT NULL DEFAULT CURRENT_TIMESTAMP
+      )
+    `);
+    await queryRunner.query(`
+      INSERT INTO f4_inspection_visit_legacy_fields_backup (
+        visit_id,
+        title,
+        planned_end_at,
+        backed_up_at
+      )
+      SELECT
+        id,
+        title,
+        planned_end_at,
+        CURRENT_TIMESTAMP
+      FROM inspection_visits
+      ON CONFLICT (visit_id) DO UPDATE SET
+        title = EXCLUDED.title,
+        planned_end_at = EXCLUDED.planned_end_at,
+        backed_up_at = EXCLUDED.backed_up_at
+    `);
+
     await queryRunner.query(`DROP INDEX IF EXISTS idx_inspection_visits_planned_dates`);
     await queryRunner.query(`
       ALTER TABLE inspection_visits
@@ -34,6 +65,19 @@ export class F4RemoveInspectionLegacyFields1790000500000 implements MigrationInt
       ALTER TABLE inspection_visits
       ADD COLUMN IF NOT EXISTS title varchar(200)
     `);
+    await queryRunner.query(`
+      ALTER TABLE inspection_visits
+      ADD COLUMN IF NOT EXISTS planned_end_at timestamptz
+    `);
+
+    await queryRunner.query(`
+      UPDATE inspection_visits visit
+      SET
+        title = backup.title,
+        planned_end_at = backup.planned_end_at
+      FROM f4_inspection_visit_legacy_fields_backup backup
+      WHERE backup.visit_id = visit.id
+    `);
     await queryRunner.query(`
       UPDATE inspection_visits
       SET title = code
@@ -44,11 +88,6 @@ export class F4RemoveInspectionLegacyFields1790000500000 implements MigrationInt
       ALTER COLUMN title SET NOT NULL
     `);
 
-    await queryRunner.query(`
-      ALTER TABLE inspection_visits
-      ADD COLUMN IF NOT EXISTS planned_end_at timestamptz
-    `);
-
     await queryRunner.query(`
       DO $$
       BEGIN
@@ -73,5 +112,7 @@ export class F4RemoveInspectionLegacyFields1790000500000 implements MigrationInt
       CREATE INDEX IF NOT EXISTS idx_inspection_visits_planned_dates
       ON inspection_visits (planned_start_at, planned_end_at)
     `);
+
+    await queryRunner.query(`DROP TABLE IF EXISTS f4_inspection_visit_legacy_fields_backup`);
   }
 }