fix: regenerate poetry.lock and update to modern Poetry config

- Update deprecated [tool.poetry.dev-dependencies] to [tool.poetry.group.dev.dependencies]
- Regenerate poetry.lock for Python 3.10+ dependencies

The poetry.lock file was out of sync with pyproject.toml after updating
to Python 3.10+ and newer package versions. This was causing the CD
workflow to fail during poetry install.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: semarj