v0.6.11

Added

• Scrapy stealth stats
  Request, response, success, failure, status, ban, recycle, proxy-use, and DNS-use
  counters appear in crawler.stats, globally and by driver where useful. Current
  driver, profile, redacted proxy, ban streak, and active DNS host count are also
  exposed. Collection reuses existing response / ban checks: no extra body parsing,
  network requests, or per-domain high-cardinality stats.

• Middleware closes engines on spider_closed
  Chrome, the DNS CONNECT relay, and the browser asyncio loop are torn down when
  the spider finishes instead of lingering until process exit.

• Full spider example
  examples/full_spider.py demonstrates settings,
  per-request drivers, snapshots, ban detection, and stealth stats. README links
  to it instead of embedding a long copy.

Changed

• Faster browser shutdown
  BrowserEngine.close() / recycle stop Chrome before draining asyncio tasks, use
  shorter teardown timeouts, and delete nodriver temp data (profiles, caches,
  cookies, GPU/shader data, and logs) on a background thread via
  _cleanup_browser_temp_data().