chore: audit committer identity used in git history before public release #98

Problem

The git history was authored under a mix of committer identities. Before the repo is made public, the maintainer should review which email addresses appear in the history and decide whether each is appropriate for a public commit log.

Proposed solution

Audit the unique committer / author identities in the history:

```sh
git log --format='%ae' | sort -u
git log --format='%ce' | sort -u
```

Decide per address:

• Keep — public identity intended for the project.
• Replace — if a non-public address appears, configure `user.email` to the desired identity for future commits. Rewriting prior history (`git filter-repo`) is invasive and only worthwhile if a leaked address must be removed; document the decision either way.

Also confirm no committer addresses appear in checked-in files:

```sh
git grep -i 'aurecongroup.com|@gmail.com' -- ':!.lock' ':!.svg'
```

Acceptance criteria

• Unique author/committer addresses listed and reviewed
• Decision recorded for each (keep / replace going forward / rewrite)
• Local `git config user.email` set to the intended public identity
• No unintended addresses appear in tracked files

Priority rationale

One-time pre-publish hygiene; cheap to check, hard to retract once public.