Switch from GitLab CI to Forgejo Actions

- Add .forgejo/workflows/ci.yaml for lint/test/type-check
- Add .forgejo/workflows/deploy.yaml for build/deploy
- Update DEPLOYMENT.md with Forgejo-specific instructions
- Remove .gitlab-ci.yml

.forgejo/workflows/ci.yaml

@@ -0,0 +1,60 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+env:
+  PIP_CACHE_DIR: ${{ github.workspace }}/.cache/pip
+  PYTHONUNBUFFERED: "1"
+
+jobs:
+  lint:
+    runs-on: docker
+    container:
+      image: python:3.12-slim
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install ruff black
+      - name: Run ruff
+        run: ruff check app tests scripts
+      - name: Run black
+        run: black --check app tests scripts
+
+  test:
+    runs-on: docker
+    container:
+      image: python:3.12-slim
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements-dev.txt
+      - name: Run tests
+        run: pytest -q tests
+      - name: Upload coverage
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-report
+          path: htmlcov/
+          retention-days: 7
+
+  type-check:
+    runs-on: docker
+    container:
+      image: python:3.12-slim
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install mypy
+          pip install -r requirements.txt
+      - name: Run mypy
+        run: mypy app scripts --ignore-missing-imports