feat: updateing the loading and unloading

apps/edr-freight-api/src/migrations/3700000000000-HandlingStandards.ts

@@ -0,0 +1,31 @@
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+/**
+ * Standard loading-and-unloading time, so the handling figure can be reported
+ * the way the OCC scorecard reports it — hours against a target, with a rate.
+ *
+ * Nullable with NO default, unlike every other column in this table. The
+ * reporting spec publishes standards for a station stay (10h / 13h) and for a
+ * turn-around cycle (65 / 88 / 96) but none for handling, so there is no
+ * honest figure to seed. Until a planner enters one in Operating standards the
+ * rate reads empty rather than judging trains against an invented number.
+ */
+export class HandlingStandards3700000000000 implements MigrationInterface {
+  name = "HandlingStandards3700000000000";
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.operations_standards
+        ADD COLUMN IF NOT EXISTS handling_standard_hours_container numeric(6,2),
+        ADD COLUMN IF NOT EXISTS handling_standard_hours_bulk numeric(6,2);
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.operations_standards
+        DROP COLUMN IF EXISTS handling_standard_hours_container,
+        DROP COLUMN IF EXISTS handling_standard_hours_bulk;
+    `);
+  }
+}