poi-import.sh ran the classifier selectors via psql \i, but psql executes
inside the postgres container (docker compose exec), so it couldn't find the
host path /opt/trails-cool/scripts/poi-selectors.sql. Concatenate BEGIN + the
selectors file contents + the build statements on the host and pipe them into
psql stdin instead, keeping the ON COMMIT DROP temp table in one transaction.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
a6f8595c4b