ci: use preinstalled tools from custom runner image (drop setup-uv/python/node actions)

.github/workflows/ci.yml

@@ -35,12 +35,6 @@ jobs:
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.12"
-      - uses: astral-sh/setup-uv@v3
-        with:
-          enable-cache: true
       - run: uv sync --extra dev
       - run: uv run ruff check src/ tests/ .opencode/scripts/
       - run: uv run ruff format --check src/ tests/ .opencode/scripts/
@@ -52,12 +46,6 @@ jobs:
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.12"
-      - uses: astral-sh/setup-uv@v3
-        with:
-          enable-cache: true
       - run: uv sync --extra dev
       - run: uv run mypy src/
 
@@ -72,26 +60,12 @@ jobs:
         python: ["3.13"]
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python }}
-      - uses: actions/setup-node@v4
-        with:
-          node-version: '22'
-          cache: 'npm'
-          cache-dependency-path: |
-            .opencode/package-lock.json
-            .opencode/draw-image/package-lock.json
-      - run: sudo apt-get update && sudo apt-get install -y ripgrep
       - run: npm ci
         working-directory: .opencode
       - run: npm ci
         working-directory: .opencode/draw-image
       - run: npm test
         working-directory: .opencode/draw-image
-      - uses: astral-sh/setup-uv@v3
-        with:
-          enable-cache: true
       - run: uv sync --extra dev --python ${{ matrix.python }}
       - run: uv run --python ${{ matrix.python }} pytest
 
@@ -102,11 +76,5 @@ jobs:
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.12"
-      - uses: astral-sh/setup-uv@v3
-        with:
-          enable-cache: true
       - run: uv sync --extra dev
       - run: uv run xenon --max-absolute B --max-modules A --max-average A src/