test(import): add legacy import compatibility coverage

backend/src/workers/db-verify.js

@@ -1,11 +1,26 @@
 const { parentPort, workerData } = require('worker_threads');
-const Database = require('better-sqlite3');
 
 if (!parentPort) throw new Error("Must be run in a worker thread");
 
+const openReadonlyDb = (filePath) => {
+  try {
+    const { DatabaseSync } = require("node:sqlite");
+    const db = new DatabaseSync(filePath, {
+      readOnly: true,
+      enableForeignKeyConstraints: false,
+    });
+    return { kind: "node:sqlite", db };
+  } catch (_err) {
+    // Fall back to better-sqlite3 on Node versions that don't have node:sqlite.
+    const Database = require("better-sqlite3");
+    const db = new Database(filePath, { readonly: true, fileMustExist: true });
+    return { kind: "better-sqlite3", db };
+  }
+};
+
 try {
   const { filePath } = workerData;
-  const db = new Database(filePath, { readonly: true, fileMustExist: true });
+  const { db } = openReadonlyDb(filePath);
   
   // This is the CPU-heavy operation
   const result = db.prepare("PRAGMA integrity_check;").get();