Replaces the gist-based read-time with the SOURCE article's full read time — the
contrast that sells the gist ("calm 1-min version here; ~10 min for the deep dive").
- goodnews/readtime.py: word_count_from_html (strips script/style/nav/header/
footer/form/button/aside furniture before counting) + source_read_minutes
(~225 wpm, 200-word floor, None when extraction looks failed/too thin).
- articles.source_words + read_checked_at columns (count only, never the body;
fits the privacy posture). Idempotent migration.
- enrich.fetch_source_words + enrich_read_times: a bounded, retry-guarded cycle
step (mirrors the image enrichers) that counts words for recent accepted
articles. Only ever writes a real count; never overwrites good with zero. Wired
into the cycle after recent-image enrichment.
- queries: source_words flows through _ARTICLE_COLUMNS; api exposes
source_read_minutes on Article (null when unknown).
- home3: News card shows "Full story · ~N min", hidden entirely when null (no
misleading "1 min").
- Tests: furniture stripping, threshold/rounding, enrich idempotency + no
zero-overwrite, API null handling. 412 backend.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
