The XHR fix worked (we now get a real 93KB HTML page, not JSON) but cheunart
still drifts — we're being served a full HTML page that isn't the feed. Add
_describe_page(): the drift error now reports the page <title> + which known
interstitial it resembles (cloudflare/bot-challenge, age-gate, login, captcha),
so the next run names the actual cause instead of "markup changed". Strong
suspicion: a Cloudflare challenge (python-requests has no JS; cf_clearance is
UA-locked and our hardcoded UA likely differs from the cookie-capturing browser).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
bvandeusen
9201b7b539