ceremony-ci-probe/changelog.d/134.md

- `lib/facts.sh` — a repository's first push to `main` (a root commit with no first parent) now reads `base_ver=(none)` and lets decide's table govern, instead of dying at exit 128 before establishing a fact; the no-base path skips the base fetch and `git show`, and an unresolvable head still fails loudly (#134).