pg_dump warns that `service_nodes` carries a circular foreign key and that a --data-only dump of it
may not restore. Today the rows come out parents-first and it loads either way, but the previous shape
made that a load-bearing accident: truncate in one psql call, load in the next, so the day the
ordering changes the live site is left EMPTY until somebody notices and restores by hand.
Both statements now run as one transaction — TRUNCATE is transactional in Postgres — with foreign-key
checks off for the session. A failed load rolls the truncate back with it.
Verified against a scratch copy of production rather than reasoned about: a `create database ...
template fofos_website`, a deliberately failing load, and all nine rows still there afterwards. The
same copy confirmed what the real run will do — gallery and its nine items promoted, hero pointing at
the new file, and `users` and `contact_submissions` untouched at 2 and 8 rows.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>