Scraped pages can carry half an emoji in their titles; sqlite3 refuses
to store lone surrogates, so one poisoned title failed archive_modeler's
batch commit and ended the whole modeling run on 10.0.0.9. Every
archive after it stayed unmodeled, and cleanup then deleted their
'empty' domain collections (1,670 -> 578).
Strip surrogates at every point Archive ingests scraped strings (titles,
author, description, url, article text), and make the modeler skip a
batch whose commit fails instead of dying.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
