fix: use setup.sh batch mode with --batch --token --cloud

- Uses AIO installer's built-in batch mode instead of interactive prompts
- --batch --token TOKEN --cloud US|EU --host HOST for non-interactive install
- cloudFromHost() maps api.wallarm.com → EU, us1.api.wallarm.com → US
- No more stdin piping, proper CLI flags

internal/native/native.go

@@ -65,7 +65,7 @@ connector:
 		return fmt.Errorf("write config: %w", err)
 	}
 
-	// 3. Ensure NGINX is installed (Wallarm node requires it)
+	// 3. Install NGINX (Wallarm node requires it as proxy layer)
 	installNginx()
 
 	// 4. Download installer if missing
@@ -100,22 +100,19 @@ WALLARM_CONFIG_PATH=%s
 		return fmt.Errorf("extract installer: %w\n%s", err, string(out))
 	}
 
-	// 6. Run the embedded setup.sh with our configuration
+	// 6. Run setup.sh in batch mode (non-interactive)
 	setupScript := filepath.Join(workDir, "setup.sh")
 	if _, err := os.Stat(setupScript); err != nil {
 		return fmt.Errorf("setup.sh not found after extraction: %w", err)
 	}
-	fmt.Printf("[%s] Running setup...\n", node.Name)
-	setupCmd := exec.Command("bash", setupScript)
-	setupCmd.Dir = workDir
-	setupCmd.Env = append(os.Environ(),
-		"WALLARM_API_TOKEN="+apiToken,
-		"WALLARM_API_HOST="+apiHost,
-		"WALLARM_LABELS="+labels,
-		"WALLARM_ACCEPT_EULA=true",
+	fmt.Printf("[%s] Running setup (batch mode)...\n", node.Name)
+	setupCmd := exec.Command("bash", setupScript,
+		"--batch",
+		"--token", apiToken,
+		"--cloud", cloudFromHost(apiHost),
+		"--host", apiHost,
 	)
-	// Pipe token + host to handle interactive prompts
-	setupCmd.Stdin = strings.NewReader(apiToken + "\n" + apiHost + "\n")
+	setupCmd.Dir = workDir
 
 	logFile, err := os.Create(filepath.Join(workDir, "install.log"))
 	if err == nil {
@@ -247,3 +244,14 @@ func installNginx() {
 	exec.Command("apt-get", "update", "-qq").Run()
 	exec.Command("apt-get", "install", "-y", "-qq", "nginx").Run()
 }
+
+// cloudFromHost maps API host to cloud region code (US/EU/ME).
+func cloudFromHost(host string) string {
+	if strings.Contains(host, "us1") {
+		return "US"
+	}
+	if strings.Contains(host, "me1") {
+		return "ME"
+	}
+	return "EU"
+}