Add GitHub Actions workflow for PR validation

[Copilot]

Implements automated CI checks for pull requests to catch issues before merge.

Workflow Jobs

• lint: Ruff format check and linting
• test: pytest across Python 3.10, 3.11, 3.12 (matrix)
• build: Package build with artifact verification

Configuration

• Triggers on PRs to main and develop branches
• Uses uv for dependency management with caching enabled
• Explicit permissions: contents: read for GITHUB_TOKEN security

The workflow runs all three jobs in parallel for fast feedback.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• astral.sh
  • Triggering command: curl -LsSf REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add pytest & build github actions workflow for pull request</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add pytest & build github actions workflow for pull request #7

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