[P2-DevOps] Add GitHub Actions CI/CD pipeline

[Ztrimus]

Problem

No CI/CD pipeline exists. PRs are not tested, linted, or validated before merge.

Solution

Create .github/workflows/ci.yml:

name: CI
on: [push, pull_request]

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: "3.11"
      - run: pip install ruff
      - run: ruff check zlm/
      - run: ruff format --check zlm/

  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: "3.11"
      - run: pip install poetry && poetry install
      - run: poetry run pytest tests/ -v --tb=short

  type-check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: "3.11"
      - run: pip install poetry && poetry install
      - run: poetry run mypy zlm/ --ignore-missing-imports

Files

• .github/workflows/ci.yml (new)
• pyproject.toml (add ruff, mypy dev deps)