chore: align infrastructure with server

scripts/transfer_ownership.cjs

@@ -0,0 +1,18 @@
+const { Pool } = require('pg');
+
+async function run() {
+  const pool = new Pool({ connectionString: 'postgresql://postgres:postgres@localhost:5432/xflow' });
+  const res = await pool.query('SELECT id, username FROM "User"');
+  console.log(JSON.stringify(res.rows, null, 2));
+  
+  // Also change owner of all canvases to the first non-system user
+  const realUser = res.rows.find(u => u.username !== 'system');
+  if (realUser) {
+    await pool.query('UPDATE "Canvas" SET "ownerId" = $1', [realUser.id]);
+    console.log('Ownership of all canvases transferred to:', realUser.username);
+  }
+  
+  await pool.end();
+}
+
+run().catch(console.error);