feat(altcha): add altcha validation layer to login

src/Flag/FlagAccessor.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Flag;
+
+use Psr\Cache\CacheItemPoolInterface;
+
+class FlagAccessor
+{
+    public const FLAG_VALUE = 'flagValue';
+
+    public function __construct(
+        private readonly CacheItemPoolInterface $cache
+    ) {
+    }
+
+    public function isFlagEnabled(FlagEnum $flagName, bool $fallbackValue = false): bool
+    {
+        $flagValue = $this->cache->getItem($flagName->value)->get();
+
+        if (null === $flagValue) {
+            return $fallbackValue;
+        }
+
+        return (bool) $flagValue;
+    }
+}