feat: big-suite terraform example + provider nodejs zip fix

- examples/big-suite: E-Commerce 10 functions, 6 layers, real depends_on
- provider: nodejs packages now wrapped in ESM zip (buildJSDeployZip)
- provider: loadPackageLiteral reads raw file, nodejs zip via source_dir
- all 10 functions verified working: python/node/ruby/go runtimes

examples/big-suite/code/node-health/main.js

@@ -0,0 +1,20 @@
+exports.handler = async (ctx) => {
+  const start = Date.now();
+
+  return {
+    body: JSON.stringify({
+      status: "ok",
+      service: "ecom-platform",
+      version: "1.0.0",
+      uptime_check: "pass",
+      checks: {
+        runtime: "ok",
+        memory_mb: process.memoryUsage ? Math.round(process.memoryUsage().heapUsed / 1024 / 1024) : null,
+        node_version: process.version || "unknown",
+      },
+      timestamp: new Date().toISOString(),
+      response_ms: Date.now() - start,
+    }),
+    headers: { "Content-Type": "application/json" },
+  };
+};