hidden subtree is now built as "predictable" to avoid duplicating it in sync

db/migrations/0210__consistency_checks.js

@@ -0,0 +1,20 @@
+module.exports = async () => {
+    const cls = require("../../src/services/cls");
+    const beccaLoader = require("../../src/becca/becca_loader");
+    const log = require("../../src/services/log");
+    const consistencyChecks = require("../../src/services/consistency_checks");
+
+    await cls.init(async () => {
+        beccaLoader.load();
+
+        try {
+            // precaution before running 211 which might produce unique constraint problems if the DB was not consistent
+            consistencyChecks.runOnDemandChecksWithoutExclusiveLock(true);
+        }
+        catch (e) {
+            // consistency checks might start failing in the future if there's some incompatible migration down the road
+            // we can optimistically assume the DB is consistent and still continue
+            log.error(`Consistency checks failed in migration 0210: ${e.message} ${e.stack}`);
+        }
+    });
+};