Summary

• Migrate the Python dev workflow and CI from pip install + venv/ to uv: python/scripts/dev bootstraps via uv sync --extra dev-all, every subcommand runs through uv run, and pre-push hooks (extras.sh, fmt-lint.sh, stubs.sh) follow suit.
• Add test-floor (3.8) and test-ceiling (3.14) dev subcommands using uv run --no-project --python <ver> --with-editable '.[dev-all]' to exercise the supported range. Pair with [tool.uv] environments = ["python_version >= '3.10'"] so the dev resolver can satisfy the docs extra (griffe-pydantic needs 3.10+) while requires-python = ">=3.8" still governs runtime.
• Rewrite python_ci.yaml around uv: a static-checks job (lint/format/mypy/pyright/stubs/extras/stubtest) plus a matrix test-python job that runs pytest under the floor interpreter. Adds a mypy --platform=win32 pass to catch Windows-only stub breakage (e.g. fcntl).
• Add a mypy override for alive_progress to neutralize its overly tight alive_it stubs, which surfaced once CI started resolving alive-progress 3.3.0 under Python ≥3.10.