Development record

The --public flag of abcd ideate record (internal/surface/cli/ideate.go:92-93; commands.md:2096) reads 'the idea is public: commit the verdict under .abcd/development/research/ideas/<root-sha>/ and record a decision pointing at it'. The verb writes the record and a decision record (internal/core/ideate/record.go:176-225) and makes no git commit: neither internal/core/ideate nor internal/core/decisions runs git beyond resolving the checkout root. Read literally, the help promises a commit the verb never makes, and the person is left with uncommitted files.