fix: Add /api/health endpoint to minimal server for Railway health checks

Author: jonathanpeterwu

src/servers/railway/minimal.ts

@@ -10,7 +10,7 @@ const PORT = process.env.PORT || 3000;
 const server = http.createServer((req, res) => {
   console.log(`${new Date().toISOString()} ${req.method} ${req.url}`);
 
-  if (req.url === '/health') {
+  if (req.url === '/health' || req.url === '/api/health') {
     res.writeHead(200, { 'Content-Type': 'application/json' });
     res.end(
       JSON.stringify({