Итерация 2: сканирование сети

- Phinx миграции: network_ranges, scan_jobs, discovered_hosts, audit_log
- Models: NetworkRange, ScanJob, DiscoveredHost
- Repositories с CRUD для всех сущностей
- NetworkScanner: ping sweep + TCP connect + ARP table + reverse DNS
- PingScanner, TcpPortScanner (curl_multi для параллелизма), ArpTableReader
- HostFingerprintService: vendor detection + confidence scoring
- ScanJobRunner + CLI worker (bin/run-scan-worker.php)
- Discovery UI: управление диапазонами, запуск скана, таблица находок
- NetworkRangeController с валидацией CIDR
- Обновлён public/index.php с DI конфигурацией для новых сервисов

app/Services/Discovery/PingScanner.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Domovoy\Services\Discovery;
+
+class PingScanner
+{
+    /**
+     * Check if host is alive via ICMP ping.
+     * Requires ping command in container.
+     */
+    public function ping(string $ip, int $timeoutMs = 500): bool
+    {
+        // Use ping with timeout (Linux: -W in seconds)
+        $timeoutSec = max(1, (int)ceil($timeoutMs / 1000));
+        $output = [];
+        $exitCode = 0;
+        exec(sprintf('ping -c 1 -W %d %s 2>/dev/null', $timeoutSec, escapeshellarg($ip)), $output, $exitCode);
+        return $exitCode === 0;
+    }
+}