TST: use Python 3.12 as default

[hagenw]

Use Python 3.12 as default in tests.

Summary by Sourcery

Use Python 3.12 as the default interpreter across tests, CI workflows, and pre-commit configuration.

CI:

• Upgrade actions/setup-python to 3.12 in linter, documentation, and publish GitHub workflows.

Chores:

• Bump default_language_version python to python3.12 in .pre-commit-config.yaml.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR bumps the default Python version from 3.10 to 3.12 across CI workflows and pre-commit, ensuring tests and tooling run under Python 3.12 by updating setup steps and configuration.

Flow diagram for CI workflow Python setup update

flowchart TD
  Checkout["actions/checkout@v4"] --> SetupPython["actions/setup-python@v5 (python-version: 3.12)"]
  SetupPython --> InstallUV["astral-sh/setup-uv"]
  InstallUV --> RunTests["Run tests/lint/docs/publish"]

Loading

File-Level Changes

Change	Details	Files
Update GitHub Actions workflows to use Python 3.12	Set python-version to 3.12 in linter workflow and remove explicit version from step name Adjust python-version matrix entry to 3.12 in documentation workflow Set python-version to 3.12 in publish workflow	.github/workflows/linter.yml .github/workflows/doc.yml .github/workflows/publish.yml
Bump pre-commit default Python runtime to 3.12	Change default_language_version python from python3.10 to python3.12	.pre-commit-config.yaml

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[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

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