fix(routes): use native global fetch with node-fetch fallback (Node 20 CI compatible)

Author: mrhpython

soulfield-v2-mvp/src/routes/aurea-sentences.js

@@ -1,7 +1,7 @@
 const express = require("express");
 
 const { sendSentence } = require('../lib/enforcedSse');
-const fetch = require('node-fetch');
+const fetch = (globalThis const fetch = require('node-fetch');const fetch = require('node-fetch'); globalThis.fetch) ? globalThis.fetch : ((...args) => import("node-fetch").then(({default: f}) => f(...args)));
 const fs = require('fs');
 const path = require('path');