fix: use apk package manager instead of apt-get

.gitea/workflows/ci.yml

@@ -8,19 +8,18 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Check /opt
+      - name: Check Python via apk
         run: |
-          ls -la /opt/ 2>/dev/null || echo "No /opt"
-          ls -la /home/ 2>/dev/null || echo "No /home"
-          df -h
-      - name: Check env
+          apk add --no-cache python3 py3-pip
+      - name: Verify Python
         run: |
-          echo "HOME=$HOME"
-          echo "PATH=$PATH"
-          echo "USER=$(whoami)"
-      - name: Check installed packages
-        run: |
-          dpkg -l | grep -i python || echo "No python packages found"
-      - name: Try pip
-        run: |
-          pip3 install -e ".[dev]" || pip install -e ".[dev]" || echo "pip not available"
+          python3 --version
+          pip3 --version
+      - name: Install deps
+        run: pip3 install -e ".[dev]"
+      - name: Lint
+        run: ruff check src/
+      - name: Type check
+        run: mypy src/
+      - name: Test
+        run: pytest tests/ -v