chore: align infrastructure with server

scripts/check_nodes.cjs

@@ -0,0 +1,8 @@
+const { Pool } = require('pg');
+async function query() {
+  const pool = new Pool({ connectionString: 'postgresql://postgres:postgres@localhost:5432/xflow' });
+  const res = await pool.query('SELECT nodes FROM "Canvas" WHERE id = \'test-crm\'');
+  console.log(JSON.stringify(res.rows[0].nodes, null, 2));
+  process.exit(0);
+}
+query();