Merge pull request #1183 from Whiznificent/main

feat(data-export): Add export artifact integrity checks

Author: Devsol-01

backend/src/migrations/1800100000000-AddExportArtifactIntegrity.ts

@@ -0,0 +1,30 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+/**
+ * Migration: Add export artifact integrity fields to data_export_requests.
+ *
+ * Adds:
+ *  - `checksum`  VARCHAR(64)  – SHA-256 hex digest of the ZIP artifact
+ *  - `fileSize`  BIGINT       – size of the artifact in bytes
+ *
+ * Both columns are nullable so existing rows are unaffected.
+ */
+export class AddExportArtifactIntegrity1800100000000
+  implements MigrationInterface
+{
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE "data_export_requests"
+        ADD COLUMN IF NOT EXISTS "checksum"  VARCHAR(64),
+        ADD COLUMN IF NOT EXISTS "fileSize"  BIGINT
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE "data_export_requests"
+        DROP COLUMN IF EXISTS "checksum",
+        DROP COLUMN IF EXISTS "fileSize"
+    `);
+  }
+}