Improve CI workflow with dependency caching and Python version matrix

[Copilot]

Addresses review feedback on PR #1 to optimize CI performance and improve test coverage.

Changes

• Dependency caching: Added enable-cache: true to all uv setup steps for faster workflow runs
• Python version matrix: Test job now validates against Python 3.12 and 3.13 to match requires-python = ">=3.12"
• Job visibility: Test job names include Python version for easier failure identification
• Security: Added explicit permissions: contents: read to limit GITHUB_TOKEN scope

test:
  name: Test (Pytest) - Python ${{ matrix.python-version }}
  runs-on: ubuntu-latest
  strategy:
    matrix:
      python-version: ["3.12", "3.13"]
  steps:
    - name: Install uv
      uses: astral-sh/setup-uv@v4
      with:
        version: "latest"
        enable-cache: true

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[coderabbitai]

Important

Review skipped

Bot user detected.

To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[Copilot]

Pull request overview

This PR optimizes the CI workflow by implementing dependency caching and comprehensive Python version testing. The changes address review feedback from PR #1 to improve both performance and test coverage.

Key Changes:

• Added enable-cache: true to all uv setup steps for faster dependency installation
• Implemented a test matrix to validate against Python 3.12 and 3.13
• Added explicit permissions: contents: read to follow the principle of least privilege

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

You can also share your feedback on Copilot code review for a chance to win a $100 gift card. Take the survey.

[sentry]

Bug: Concurrent CI matrix jobs using setup-uv with enable-cache: true will experience cache key collisions and upload failures.
_{Severity: MEDIUM | Confidence: High}

🔍 Detailed Analysis

When multiple matrix jobs (e.g., Python 3.12 and 3.13) run concurrently, both use enable-cache: true with astral-sh/setup-uv@v4 and attempt to install dependencies. Because the setup-uv action is not provided with python-version input and no cache-suffix is specified, both jobs generate the same cache key. This leads to a race condition where both jobs try to upload to the same cache simultaneously, resulting in cache upload failures for at least one job, wasted CI time, and potentially inconsistent cache states.

💡 Suggested Fix

Either pass python-version: ${{ matrix.python-version }} directly to astral-sh/setup-uv@v4 or add cache-suffix: ${{ matrix.python-version }} to the action configuration to differentiate cache keys for matrix jobs.

🤖 Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: .github/workflows/ci.yml#L56-L77

Potential issue: When multiple matrix jobs (e.g., Python 3.12 and 3.13) run
concurrently, both use `enable-cache: true` with `astral-sh/setup-uv@v4` and attempt to
install dependencies. Because the `setup-uv` action is not provided with
`python-version` input and no `cache-suffix` is specified, both jobs generate the same
cache key. This leads to a race condition where both jobs try to upload to the same
cache simultaneously, resulting in cache upload failures for at least one job, wasted CI
time, and potentially inconsistent cache states.

_{Did we get this right? 👍 / 👎 to inform future reviews.
Reference ID: 3596559}