Adds OpenPageOptions.AllowNonOKStatus. When set, openPage no longer closes
the page on non-2xx (other than 404) and Open returns both a usable Document
and ErrInvalidStatusCode. archive.IsArchived and Archive opt in, so callers
can PromoteToInteractive the captcha page, hand it to a human solver, and
demote back to extract content from the same browser instance — avoiding
the cf_clearance fingerprint-binding issue that re-challenges any fresh
retry browser.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
steve