refactor(daemon): share runtime and service probe helpers

src/infra/ports-probe.ts

@@ -0,0 +1,24 @@
+import net from "node:net";
+
+export async function tryListenOnPort(params: {
+  port: number;
+  host?: string;
+  exclusive?: boolean;
+}): Promise<void> {
+  const listenOptions: net.ListenOptions = { port: params.port };
+  if (params.host) {
+    listenOptions.host = params.host;
+  }
+  if (typeof params.exclusive === "boolean") {
+    listenOptions.exclusive = params.exclusive;
+  }
+  await new Promise<void>((resolve, reject) => {
+    const tester = net
+      .createServer()
+      .once("error", (err) => reject(err))
+      .once("listening", () => {
+        tester.close(() => resolve());
+      })
+      .listen(listenOptions);
+  });
+}