fix: health.php respuesta instantánea — sin DB ni Redis

Versión anterior intentaba conectar a DB (g1286...) y Redis (zqmfom0...)
que colgaban esperando conexión → todos los workers PHP-FPM bloqueados →
nginx acepta TCP pero no responde HTTP → healthcheck timeout → unhealthy.

health.php

@@ -1,99 +1,9 @@
 <?php
 /**
- * Health check endpoint para Docker
- * Verifica que todos los servicios estén funcionando
+ * Health check endpoint — respuesta instantánea.
+ * NO conecta a DB ni Redis (esas conexiones bloquean PHP-FPM y causan
+ * healthcheck timeout → contenedor unhealthy → Traefik "no available server").
  */
-
-// Cargar autoload solo si existe (en desarrollo podría no estar)
-if (file_exists(__DIR__ . '/vendor/autoload.php')) {
-    require_once __DIR__ . '/vendor/autoload.php';
-}
-
 header('Content-Type: application/json');
-
-$health = [
-    'status' => 'healthy',
-    'timestamp' => date('Y-m-d H:i:s'),
-    'checks' => []
-];
-
-// 1. Check PHP
-$health['checks']['php'] = [
-    'status' => 'ok',
-    'version' => PHP_VERSION
-];
-
-// 2. Check Database
-try {
-    require_once __DIR__ . '/config/config.php';
-    $db = Database::getInstance();
-    $result = $db->query("SELECT 1")->fetch();
-    
-    $health['checks']['database'] = [
-        'status' => $result ? 'ok' : 'warning',
-        'host' => DB_HOST
-    ];
-} catch (Exception $e) {
-    // DB caída = warning, no unhealthy — Traefik debe seguir ruteando
-    // (mejor mostrar error 500 en la app que "no available server")
-    $health['checks']['database'] = [
-        'status' => 'warning',
-        'error' => $e->getMessage()
-    ];
-}
-
-// 3. Check Redis
-try {
-    $redis = new Predis\Client([
-        'scheme' => getenv('REDIS_SCHEME') ?: 'tcp',
-        'host'   => getenv('REDIS_HOST') ?: 'redis',
-        'port'   => getenv('REDIS_PORT') ?: 6379,
-    ]);
-    
-    $ping = $redis->ping();
-    
-    $health['checks']['redis'] = [
-        'status' => ((string)$ping === 'PONG' || $ping === true) ? 'ok' : 'warning',
-        'host' => getenv('REDIS_HOST') ?: '127.0.0.1'
-    ];
-} catch (Exception $e) {
-    // Redis es opcional — no marcar el app como unhealthy si Redis falla
-    $health['checks']['redis'] = [
-        'status' => 'warning',
-        'error' => $e->getMessage()
-    ];
-}
-
-// 4. Check logs directory
-$health['checks']['logs'] = [
-    'status' => is_writable(__DIR__ . '/logs') ? 'ok' : 'error',
-    'writable' => is_writable(__DIR__ . '/logs')
-];
-
-// 5. Check uploads directory
-$health['checks']['uploads'] = [
-    'status' => is_writable(__DIR__ . '/uploads') ? 'ok' : 'error',
-    'writable' => is_writable(__DIR__ . '/uploads')
-];
-
-// 6. Check Queue stats (opcional)
-try {
-    require_once __DIR__ . '/queue/RedisQueue.php';
-    $queue = new WhatsApp\Queue\RedisQueue();
-    $stats = $queue->getStats();
-    
-    $health['checks']['queue'] = [
-        'status' => 'ok',
-        'stats' => $stats
-    ];
-} catch (Exception $e) {
-    $health['checks']['queue'] = [
-        'status' => 'warning',
-        'error' => $e->getMessage()
-    ];
-}
-
-// HTTP status code
-http_response_code($health['status'] === 'healthy' ? 200 : 503);
-
-echo json_encode($health, JSON_PRETTY_PRINT);
+http_response_code(200);
+echo json_encode(['status' => 'healthy', 'php' => PHP_VERSION, 'ts' => time()]);