add tests

[joamatab]

Summary by Sourcery

Add a GitHub Actions workflow for automated linting and testing with pre-commit checks and pytest on push and pull requests.

CI:

• Add .github/workflows/test_code.yml to run CI on pull_request and push with concurrency control
• Set up a matrix job on Ubuntu with Python 3.12

Tests:

• Introduce a pre-commit job to enforce code standards
• Configure a test_code job to install dependencies via uv and run pytest

[sourcery-ai]

Reviewer's Guide

This PR introduces a new GitHub Actions workflow to enforce pre-commit checks and run the test suite automatically via uv and pytest on push and pull request events.

File-Level Changes

Change	Details	Files
Add CI workflow configuration	Define workflow triggers for pull_request and push to main Set up concurrency grouping with cancellation Expose GFP_API_KEY from repository secrets	.github/workflows/test_code.yml
Implement pre-commit validation job	Checkout repository Setup Python environment Run pre-commit hooks via pre-commit/action	.github/workflows/test_code.yml
Implement test execution job	Configure matrix for Python 3.12 on ubuntu-latest Checkout repository and setup Python Install uv CLI and sync dependencies Run tests with pytest through uv	.github/workflows/test_code.yml

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[sourcery-ai]

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