Installing pql cut the failures 36→8, but the remaining ticket-query tests run against the working directory's `.pql/pql.db`, which is gitignored — the post-checkout hook normally rebuilds it from the committed `.pql/changelog/`. A fresh CI checkout has the changelog but no db, so pql reports vault-not-found (exit 66). Run `pql plan import` after the install to materialize it. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>