fix: add migration to set default updatedBy (#2134)

Author: minottic

migrations/20250819141206-add-updatedBy-from-createdBy.js

@@ -0,0 +1,29 @@
+const collections = [
+  "Attachment",
+  "Datablock",
+  "Dataset",
+  "Job",
+  "OrigDatablock",
+  "Policy",
+  "Proposal",
+  "PublishedData",
+  "Sample",
+];
+
+
+module.exports = {
+  async up(db, client) {
+    for (const collectionName of collections) {
+      await db
+        .collection(collectionName)
+        .updateMany(
+          { updatedBy: { $exists: false } },
+          [{ $set: { updatedBy: "$createdBy" } }]
+        );
+    }
+  },
+
+  async down(db, client) {
+    // No path backward as it's not easy to find on down where updatedBy was added
+  },
+};