fix(scraper): recognize robot interstitials and preserve known stock status - #71
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…status Digitec answers the browser scraper with an 'Are you a robot?' interstitial (robots-noindex, no product data), which the soft-404 checks misread as a dead page. - detectBotChallenge now recognizes robot-check interstitial titles, so the page is classified as a challenge before the soft-404 checks run. - A scrape that resolves stock as 'unknown' (blocked page, failed extraction) no longer overwrites a real previously-known stock status. - The browser scraper re-reads the page up to twice, 8s apart, when the content matches a challenge interstitial — many auto-resolve once their JS fingerprinting completes.
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Summary
Follow-up to #70, from live verification against digitec:
detectBotChallengenow recognizes robot-check interstitial titles ("Are you a robot?" etc.), so they classify as challenges before the soft-404 checks can misread them as dead pagesunknownno longer overwrites a real previously-known statusValidation