fix(network): apply connection timeout in server and extension hosts

Complete the runtime entrypoints from #3404 without changing address-family selection.

packages/vscode/src/networkDefaults.ts

@@ -0,0 +1,15 @@
+import * as net from 'node:net';
+
+// Mirrors the web runtime policy for distant quota endpoints. The extension
+// host has its own Node fetch stack and does not inherit server defaults.
+export function applyConnectAttemptTimeout(
+  netModule: Partial<Pick<typeof net, 'setDefaultAutoSelectFamilyAttemptTimeout'>> = net,
+): boolean {
+  try {
+    if (!netModule.setDefaultAutoSelectFamilyAttemptTimeout) return false;
+    netModule.setDefaultAutoSelectFamilyAttemptTimeout(5_000);
+    return true;
+  } catch {
+    return false;
+  }
+}