Improvements to offline entity backlog processing (#1171)

* Improvements to offline entity backlog processing

* Add branchid to entity base version query

lib/model/migrations/20240715-01-backlog-add-event-entityuuid.js

@@ -0,0 +1,25 @@
+// Copyright 2024 ODK Central Developers
+// See the NOTICE file at the top-level directory of this distribution and at
+// https://github.com/getodk/central-backend/blob/master/NOTICE.
+// This file is part of ODK Central. It is subject to the license terms in
+// the LICENSE file found in the top-level directory of this distribution and at
+// https://www.apache.org/licenses/LICENSE-2.0. No part of ODK Central,
+// including this file, may be copied, modified, propagated, or distributed
+// except according to the terms contained in the LICENSE file.
+
+const up = async (db) => {
+  await db.raw(`ALTER TABLE entity_submission_backlog
+    ADD COLUMN "auditId" INT4 NOT NULL,
+    ADD COLUMN "entityUuid" UUID NOT NULL,
+    ADD CONSTRAINT fk_audit_id
+      FOREIGN KEY("auditId")
+      REFERENCES audits(id)
+      ON DELETE CASCADE`);
+};
+
+const down = (db) => db.raw(`ALTER TABLE entity_submission_backlog
+  DROP COLUMN "auditId",
+  DROP COLUMN "entityUuid"
+`);
+
+module.exports = { up, down };