v0.2.4

Fixed

• ScraperEngine.close() now closes the curl_cffi impersonation transport.
  Previously requests.Session.close() only disposed the standard urllib3
  adapters, leaking the curl_cffi session (libcurl handle + connection pool)
  when impersonation was enabled, causing per-job scrapers to accumulate native
  handles.
• Re-mounting TLS adapter to repalce the existing https:// adapter in
  self.adapters. Close the old one first so its urllib3 PoolManager
  (open sockets) and SSLContext are released now; cipher rotation
  re-mounts almost every request, so relying on cyclic GC lets these native
  handles accumulate.