CI: update checkout, setup-python, setup-uv, codecov

[ChristianGeng]

Summary

Two related CI bugs, both caused by stale GitHub Action version pins:

1. Dead uv caching: astral-sh/setup-uv's default cache-dependency-glob
   keys on uv.lock / requirements*.txt, neither of which exists in this
   repo (no committed lockfile, by design). Caching has therefore silently
   never worked. Bumped from v5 to v9.0.0: v6.0.0 added
   pyproject.toml to the default glob, which is committed and changes
   exactly when a dependency does — so caching now works with no lockfile
   needed.

2. Node.js 20 deprecation: actions/checkout@v4, actions/setup-python@v5,
   and the old setup-uv pin all still targeted the deprecated Node 20
   runtime. Bumped checkout and setup-python to v7, and setup-uv's
   v7.0.0 also carries the Node 20 → Node 24 runtime bump.
   codecov/codecov-action@v4 bumped to v7; its v5 rewrite dropped the
   singular file: input in favor of files: (plural) — renamed
   accordingly in test.yml so the coverage upload doesn't silently no-op.
   No actions/cache usage exists in this repo's workflows.

prune-cache left at its new default (off): audobject's runtime dependencies
(asttokens, audeer, oyaml, packaging) have no large pre-built binary
wheels like torch, so pruning would save ~0 disk space while costing
avoidable re-downloads.

Test plan

• All four changed workflow YAML files validated with
  uv run --isolated --with pyyaml python3 -c "import yaml; yaml.safe_load(open('FILE'))"
• CI passes on this PR (checkout/setup-python/setup-uv/codecov-action
  bumps exercised across the full test matrix)

Part of the same CI cleanup as audeering/audeer#206,
audeering/opensmile-python#132, audeering/audb#591,
audeering/audformat#539, audeering/audbackend#307,
audeering/audresample#83, audeering/auglib#60, audeering/audonnx#115,
audeering/audinterface#206, audeering/audiofile#193,
audeering/audmath#76, and audeering/audmetric#94.

🤖 Generated with Claude Code

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates CI workflows to use newer GitHub Actions versions that run on the Node.js 24 runtime, fixes uv caching by leveraging the updated default cache glob including pyproject.toml, and updates Codecov configuration to the new multi-file input API so coverage uploads work correctly.

Sequence diagram for updated CI workflow with uv caching and Codecov

sequenceDiagram
    actor Developer
    participant GitHubActionsRunner as GitHubActionsRunner
    participant actions_checkout as actions_checkout_v7
    participant actions_setup_python as actions_setup_python_v7
    participant setup_uv as setup_uv_v9_0_0
    participant TestSuite as pytest
    participant codecov_action as codecov_action_v7

    Developer->>GitHubActionsRunner: push commit
    GitHubActionsRunner->>actions_checkout: uses actions/checkout@v7
    actions_checkout-->>GitHubActionsRunner: repository checked out

    GitHubActionsRunner->>actions_setup_python: uses actions/setup-python@v7
    actions_setup_python-->>GitHubActionsRunner: Python environment ready

    GitHubActionsRunner->>setup_uv: uses astral-sh/setup-uv@v9.0.0
    setup_uv-->>GitHubActionsRunner: cache resolved using pyproject.toml

    GitHubActionsRunner->>TestSuite: run pytest
    TestSuite-->>GitHubActionsRunner: coverage.xml generated

    GitHubActionsRunner->>codecov_action: uses codecov/codecov-action@v7
    codecov_action-->>GitHubActionsRunner: upload using files input
    GitHubActionsRunner-->>Developer: CI results and coverage reported

Loading

File-Level Changes

Change	Details	Files
Upgrade core GitHub Actions (checkout, setup-python, setup-uv) across all workflows to versions that support the Node.js 24 runtime and correct uv caching behavior.	Bump actions/checkout from v4 to v7 in test, doc, linter, and publish workflows. Bump actions/setup-python from v5 to v7 in all workflows that set up Python. Bump astral-sh/setup-uv from v5 to v9.0.0 so that pyproject.toml is included in the default cache-dependency-glob and uv caching becomes effective.	.github/workflows/test.yml .github/workflows/doc.yml .github/workflows/linter.yml .github/workflows/publish.yml
Update Codecov CI configuration to the new action major version and API to ensure coverage uploads execute correctly.	Bump codecov/codecov-action from v4 to v7 in the test workflow. Rename the Codecov input key from file to files to match the new action’s plural input syntax.	.github/workflows/test.yml

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[sourcery-ai]

Hey - I've left some high level feedback:

• Since the same action versions and uv setup are repeated across multiple workflows (test, doc, linter, publish), consider extracting the common logic into a reusable workflow or composite action to keep these pins centralized and reduce the risk of version drift in future updates.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Since the same action versions and uv setup are repeated across multiple workflows (test, doc, linter, publish), consider extracting the common logic into a reusable workflow or composite action to keep these pins centralized and reduce the risk of version drift in future updates.

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[ChristianGeng]

Re: extracting a reusable workflow for the shared action pins — reasonable idea in the abstract, but out of scope for this PR, which is deliberately a minimal, uniform version bump across many repos rather than a refactor. Introducing a shared composite action now would mean redoing all sibling PRs (audeer#206, opensmile-python#132, audb#591, audformat#539, audbackend#307, audresample#83, auglib#60, audonnx#115, audinterface#206, audiofile#193, audmath#76, audmodel#63) to adopt it too. Worth raising separately if there's appetite for it.