feat(node-agent): add package.json for cluster heartbeat agent

services/node-agent/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "wild-dragon-node-agent",
+  "version": "1.0.0",
+  "description": "Wild Dragon MAM cluster node agent — heartbeats system stats to the primary orchestrator",
+  "type": "module",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "engines": {
+    "node": ">=18"
+  }
+}