feat: add remote config and host metadata

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/hostmeta/hostmeta_test.go

@@ -0,0 +1,19 @@
+package hostmeta
+
+import "testing"
+
+func TestHostnameNonEmpty(t *testing.T) {
+	h, err := Hostname()
+	if err != nil || h == "" {
+		t.Fatalf("hostname: %q err=%v", h, err)
+	}
+}
+
+func TestIPsSkipsLoopback(t *testing.T) {
+	ips := IPs()
+	for _, ip := range ips {
+		if ip == "127.0.0.1" || ip == "::1" {
+			t.Fatalf("loopback in ips: %v", ips)
+		}
+	}
+}