CI: separate lint + mypy step; run mypy with all supported Python versions

Author: akx

.github/workflows/lint.yml

@@ -28,5 +28,23 @@ jobs:
         uses: astral-sh/setup-uv@c771a70e6277c0a99b617c7a806ffedaca235ff9 # v9.0.0
       - name: Lint
         run: uvx --with tox-uv tox -e lint
+  mypy:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [
+          "3.14",
+          "3.13",
+          "3.12",
+          "3.11",
+        ]
+    name: Mypy
+    steps:
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          persist-credentials: false
+      - name: Install uv
+        uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39 # v8.2.0
       - name: Mypy
-        run: uvx --with tox-uv tox -e mypy
+        run: uvx --python=${{ matrix.python-version }} --with tox-uv tox -e mypy