Update ESLint rules, enhance environment schema with new metrics and health port, and refactor Redis import. Change TypeScript definitions path in package.json.

apps/bot/src/health.ts

@@ -0,0 +1,32 @@
+import { createServer } from 'node:http';
+import { env } from './env.js';
+
+export function startHealthServer(): void {
+  const server = createServer((req, res) => {
+    if (!req.url) {
+      res.statusCode = 400;
+      res.end('Bad Request');
+      return;
+    }
+    if (req.url === '/health') {
+      res.statusCode = 200;
+      res.end('ok');
+      return;
+    }
+    if (req.url === '/metrics') {
+      const auth = req.headers.authorization;
+      if (!env.METRICS_TOKEN || auth !== `Bearer ${env.METRICS_TOKEN}`) {
+        res.statusCode = 401;
+        res.end('Unauthorized');
+        return;
+      }
+      res.statusCode = 200;
+      res.end('# Prometheus metrics scaffold\nnexumi_up 1\n');
+      return;
+    }
+    res.statusCode = 404;
+    res.end('Not Found');
+  });
+
+  server.listen(env.HEALTH_PORT);
+}