feat(warehouses): allow deleting a warehouse

Soft-delete route guarded by warehouses:delete, refused with 409 while
yards remain — zones and inventory hang off a yard, so cascading would
orphan stock. Backoffice list gets a delete action in both views,
omitted when the user lacks the permission.

apps/edr-freight-api/src/migrations/3800000000000-WarehouseInventoryBacklogRegistration.ts

@@ -0,0 +1,34 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+/**
+ * Backlog registration of full containers that were already sitting in a yard
+ * before the system knew about them. Such a row carries a true, backdated
+ * `arrived_at` for the record but accrues NO storage or demurrage — the
+ * operator decided these are not billable retroactively — so the flag exists
+ * to keep the fee engine off them.
+ *
+ * `company_id` / `company_name` carry the owner, since a backlog row has no
+ * booking to inherit one from. The name is free text for a company that is not
+ * a registered customer yet.
+ */
+export class WarehouseInventoryBacklogRegistration3800000000000 implements MigrationInterface {
+  name = 'WarehouseInventoryBacklogRegistration3800000000000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.warehouse_inventory
+        ADD COLUMN IF NOT EXISTS backlog_registration boolean NOT NULL DEFAULT false,
+        ADD COLUMN IF NOT EXISTS company_id uuid,
+        ADD COLUMN IF NOT EXISTS company_name varchar(200)
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.warehouse_inventory
+        DROP COLUMN IF EXISTS backlog_registration,
+        DROP COLUMN IF EXISTS company_id,
+        DROP COLUMN IF EXISTS company_name
+    `);
+  }
+}