- dependabot.yml: add uv ecosystem (updates pyproject.toml + uv.lock together), github-actions ecosystem (keeps action versions current), and group all Python deps into one weekly PR - lint.yml, test.yml: extend triggers to dev branch so ruff and pytest run on push/PR to dev, not just main Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>