ci: provision Python before installing dependencies

Author: Labeeb2339

.github/workflows/ci.yml

@@ -13,6 +13,9 @@ jobs:
     timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.11"
       - uses: astral-sh/setup-uv@v6
         with:
           python-version: "3.11"