Adds federation identity fields to town.json: - Owner: email address for entity identity (defaults to git user.email) - PublicName: public display name (defaults to town name) Schema version bumped to 2. Existing town.json files remain compatible as new fields are optional. Also adds --owner and --public-name flags to 'gt install'. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>