adding telegram notifications

src/Storage/Repository.php

@@ -239,12 +239,25 @@ class Repository
     }
 
     public function setAllowedUserTokens(array $tokens): void
+    {
+        $this->setConfig('allowed_user_tokens', json_encode(array_values($tokens)));
+    }
+
+    public function getConfig(string $key, mixed $default = null): mixed
+    {
+        $stmt = $this->db->pdo()->prepare("SELECT value FROM config WHERE key = ?");
+        $stmt->execute([$key]);
+        $row = $stmt->fetch();
+        return $row ? $row['value'] : $default;
+    }
+
+    public function setConfig(string $key, string $value): void
     {
         $stmt = $this->db->pdo()->prepare(
             "INSERT INTO config (key, value) VALUES (?, ?)
              ON CONFLICT(key) DO UPDATE SET value = excluded.value"
         );
-        $stmt->execute(['allowed_user_tokens', json_encode(array_values($tokens))]);
+        $stmt->execute([$key, $value]);
     }
 
     // --- Rate Limiting ---