Added orchestration layer

packages/orchestration-service/src/routes/chat.js

@@ -0,0 +1,24 @@
+const { Router } = require('express')
+const { chat } = require('../chat/index');
+
+const router = Router();
+
+router.post('/chat', async (req, res) => {
+    const { sessionId, message } = req.body;
+
+    if (!sessionId) return res.status(400).json({ error: 'sessionId is required'});
+    if (!message) return res.status(400).json({ error: 'message is required'});
+
+    try {
+        const result = await chat(sessionId, message, {
+            model: req.body.model,
+            temperature: req.body.temperature,
+        });
+        res.json(result)
+    } catch (err) {
+        console.error(`[orchestration] chat error: `, err.message)
+        res.status(500).json ({ error: err.message})
+    }
+});
+
+module.exports = router;