feat: Secure SMS verification with Redis (Predis)

- Added Predis library for Redis connection (no PHP extension required)
- Server-side SMS code generation and storage in Redis
- Rate limiting and brute-force protection
- Integration with n8n webhook for SMS sending
- Environment variables moved to .env file
- Fixed policy verification endpoint
- Added file-based fallback if Redis unavailable

test_redis.php

@@ -0,0 +1,34 @@
+<?php
+header('Content-Type: text/plain; charset=utf-8');
+
+echo "PHP Version: " . PHP_VERSION . "\n";
+echo "SAPI: " . php_sapi_name() . "\n";
+echo "extension_loaded('redis'): " . (extension_loaded('redis') ? 'YES' : 'NO') . "\n";
+echo "class_exists('Redis'): " . (class_exists('Redis') ? 'YES' : 'NO') . "\n";
+
+if (class_exists('Redis')) {
+    try {
+        $redis = new Redis();
+        $host = 'crm.clientright.ru';
+        $port = 6379;
+        $connected = @$redis->connect($host, $port, 2);
+        if ($connected) {
+            echo "Redis connection: SUCCESS\n";
+            $ping = $redis->ping();
+            echo "Redis ping: " . var_export($ping, true) . "\n";
+        } else {
+            echo "Redis connection: FAILED\n";
+        }
+    } catch (Exception $e) {
+        echo "Redis error: " . $e->getMessage() . "\n";
+    }
+} else {
+    echo "Redis class not available\n";
+    echo "Loaded extensions:\n";
+    $extensions = get_loaded_extensions();
+    foreach ($extensions as $ext) {
+        if (stripos($ext, 'redis') !== false) {
+            echo "  - $ext\n";
+        }
+    }
+}